0697285998520

Heatguard

Model 24409

Internet #203721329

Store SKU #398764

Store SO SKU #732682

Water Heater Tank Booster

$89.97 /each
  • Doubles your hot water supply
  • Easy-to-install DIY project, no soldering or glue required
  • Protects from scalding hot water

Frequently Bought Together

Product Overview

Are you tired of running out of hot water? The Tank Booster is the solution to your problem. If you are unable to get the amount of usable hot water needed out of your plumbing system, installing Tank Booster on your existing water heater can double the amount of usable hot water. The Tank Booster is a thermostatic mixing valve that mixes hot and cold water together to deliver the desired output temperature. After installing, turn the set temperature on your water heater up from 120°F to 140°F. The Tank Booster then mixes cold water back in to reduce the temperature down to a safe 120°F. By storing water at a higher temperature and mixing cold water in to reduce the temperature, you will double the amount of usable hot water delivery from the same size tank. As an added benefit, the Tank Booster protects your entire home from scalding by regulating the output temperature to a 120°F. Even better, by turning up your water heater temperature to 140°F, you can help protect yourself from legionella bacteria growth. The number one cause of legionella bacteria growth is water stored at temperatures of 68°F to 113°F; this bacteria cannot survive at temperatures of 140°F and higher.

California residents: see   Proposition 65 information

  • Enables you to double your hot water
  • Easy-to-install DIY project; no soldering or glue required
  • Protect your home from scalding by regulation output temperature to a safe 120°F
  • Allows water to be stored at 140°F, preventing the growth of bacteria
  • Lead-free DZR brass for durability
  • High-grade polymers, polished finish and generous water passages prevent scaling and liming build-up
  • Features a knob for temperature adjustment
  • Integrated non-return checks and filters on both inlets
  • Certified for household and commercial applications
  • Can be used with gas, electric, power vent and tankless heaters
  • ASSE 1017 listed
  • NSF/ANSI 372 and NSF/ANSI 61 certified
  • Listed by ASSE and IAPMO

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17 Questions72 Answers

Customer Questions & Answers

Water Heater Tank Booster
Water Heater Tank Booster

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13 answers

Does it cut your utility cost and water usage

This question is from Water Heater Tank Booster
Asked by
Joe
Moberly
February 14, 2013
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Asked by
mocksville nc
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Home Improvement Profile: Professional
August 2, 2016
Answer: 
There have been lot of answers to this question. I have seen a small increase. The increase for me is controlled by a timer on the water heater. I live alone and only use hot water morning and evening.
For years I have had a timer. My hot water heater takes about an hour to heat the tank from cold and yes its burning through the KH but none is used @ idle. I go through a bunch between the shower, Read More
There have been lot of answers to this question. I have seen a small increase. The increase for me is controlled by a timer on the water heater. I live alone and only use hot water morning and evening.
For years I have had a timer. My hot water heater takes about an hour to heat the tank from cold and yes its burning through the KH but none is used @ idle. I go through a bunch between the shower, dishwasher, clothes washer which is used daily like in a family of 3-4.
So my system is different but effective and efficient. A mechanical timer is cheap and this mixer means i have all the hotwater i can use until it turns off. A tank of 140d water will stay warm over night and fireup quick in the morning....warm water for washing hands inbetween. I use two schedules for winter and summer. i need an hour more in winter. Its on a total of 7-8hrs a day. 1/3 less than 24/7. i am sure i am still saving money even with the mixer i will need more time to confirm how much. my last water heater lasted 33 years. the timer was on 20yrs as well as a sediment water filter that gets changed qtrly. Read Less
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Asked by
tennessee
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Home Improvement Profile: Professional
March 10, 2016
Answer: 
The answer is simple, NO. It doesn't cut the cost of operation. Yes the water is mixing about the water heater and using less hot water from the tank due to this process. But it is also heating the water at least 20 degrees above normal set point and keeping that water at that temperature all day even when not in use. And as normal when enough hot water is removed from the water heater your elements are Read More
The answer is simple, NO. It doesn't cut the cost of operation. Yes the water is mixing about the water heater and using less hot water from the tank due to this process. But it is also heating the water at least 20 degrees above normal set point and keeping that water at that temperature all day even when not in use. And as normal when enough hot water is removed from the water heater your elements are going to kick on they normally would, and start the cycle over again and again. I have been doing plumbing for 10 years and i Try products on my home before i ever take them to someones home. so simply you will not save money on energy cost, nor will it use less water, but on the positive you do get roughly 30% more hot water in your home. Read Less
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Asked by
Burlington Vermont
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May 12, 2015
Answer: 
It won't save you water but it will cost you less energy bills because it blends hot water with cooler water saving you money. It extends the number of gallons of hot water available. The clue is to raise your water temp a little higher on the water heater thermostat and blend it at the Heat Guard.
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Asked by
Meridian, Idaho
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Home Improvement Profile: DIYer
February 10, 2015
Answer: 
I installed one of these.
I can't compare year over year because we got an exchange student last fall BUT I can compare month over month since I installed in early December.
Also, I asked about how to install with dielectric heat nipples on this forum.
I will report back in a month or so.
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Asked by
Claymont, DE
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Home Improvement Profile: DIYer
February 10, 2015
Answer: 
It will absolutely INCREASE your gas or electric usage. Anyone who says otherwise is simply incorrect and fails to understand the basic physics/thermodynamics of hot water heating. There are 100s of interdependent variables to determining exactly how much energy is used by one set up or another, but the overall basic principle is that heat transfer accelerates based on the temperature difference. So your Read More
It will absolutely INCREASE your gas or electric usage. Anyone who says otherwise is simply incorrect and fails to understand the basic physics/thermodynamics of hot water heating. There are 100s of interdependent variables to determining exactly how much energy is used by one set up or another, but the overall basic principle is that heat transfer accelerates based on the temperature difference. So your tank at 140 will lose heat just sitting there much faster than your tank at 120 will. Yes, 2.5 gpm at the shower will use less 140 water than 120 water, but that's wholly irrelevant to the amount of energy used, and the 140 water will use more energy staying at 140 than the 120 water will. So then why do it?
This (or other TMV solutions) are by far the cheapest up-front cost solution to increasing hot water supply. If your current hot water tank is insufficient, less than nine or ten years old and you want to make sure faucets cannot provide scalding hot water, then your best plan of action is to install this now, raise the tank temperature, then when your tank dies, buy a larger tank and set it at a lower temperature (or buy a tank-less), and sell this device to someone who has also outgrown their perfectly functioning tank. (Alternatively, if you generally have enough hot water except a couple times a year when people visit, then buy the same sized tank, re-install this, set the tank temperature to 120 and raise the tank temperature when guests visit).
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Asked by
California, USA
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February 8, 2015
Answer: 
No. Because the water heater is now turned up higher, it will use more energy. Water usage will not be affected unless you decide to take longer showers because you now have more hot water.
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Asked by
Brookfield, MO, USA
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Home Improvement Profile: DIYer
January 27, 2015
Answer: 
Yes Joe, I believe you will see a significant drop in your utility costs depending on how much water you now heat and use.
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Asked by
South Hill, VA
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September 20, 2014
Answer: 
Yes, it has too but only if you raise your tanks water temperature.
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Asked by
Wichita Falls TX
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April 8, 2014
Answer: 
Energy - YES
Water Usage - NO
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Asked by
Olathe, KS, USA
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Home Improvement Profile: DIYer
January 24, 2014
Answer: 
It has only been a month and I am seeing a drop in my Water Bill and Gas Bill. I want to make sure that my bills continue to drop and will follow up in a new review on the Tank Booster when I get enough data.
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Asked by
Seattle
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September 7, 2013
Answer: 
No, it shouldn't cut utility cost or water usage
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Asked by
Sugar Hill, GA, USA
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July 24, 2013
Answer: 
No, it will cost more to keep your water heater set at a higher temperature. The water usage will be the same (i.e. 2.5gpm for shower).
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February 14, 2013
Answer: 
There are many factors that must be considered when discussing your utility cost. Tank Booster will increase the capacity to deliver hot water around your house, so your utility cost will depend greatly on your hot water consumption.
In terms of your water usage, you will be using less hot water out of your tank each time it is delivered at a fixture. However your overall water bill will still depend Read More
There are many factors that must be considered when discussing your utility cost. Tank Booster will increase the capacity to deliver hot water around your house, so your utility cost will depend greatly on your hot water consumption.
In terms of your water usage, you will be using less hot water out of your tank each time it is delivered at a fixture. However your overall water bill will still depend largely on your water consumption. Read Less
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12 answers

Does this unit speed up hot water delivery to various faucets?

This question is from Water Heater Tank Booster
Asked by
CRASHNASH
Locust Grove,Ga.
January 3, 2013
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Answers (12)

Asked by
new england
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Home Improvement Profile: DIYer
January 27, 2016
Answer: 
NO. This device mixes hot and cold water together to get a fixed output temp -- it's set at 120F. That means you can boost the water heater temp to 140 or 150 deg, and still have safe (non scalding temp) water temp delivered to your fixtures. This means you have a larger 'thermal reservoir' available, and thus ability to use more hot water in at one time. It wont speed the recovery of the tank.
There Read More
NO. This device mixes hot and cold water together to get a fixed output temp -- it's set at 120F. That means you can boost the water heater temp to 140 or 150 deg, and still have safe (non scalding temp) water temp delivered to your fixtures. This means you have a larger 'thermal reservoir' available, and thus ability to use more hot water in at one time. It wont speed the recovery of the tank.
There are a couple simple recirc pumps for aftermarket -- Grundfos markets one, so does Laing (Autocirc). These keep the hot water lines full of hot water, by circulating hot water back through the 'cold' lines. You then have instant hot water available at the fixture. The cold lines heat a bit, but are just lukewarm, as a thermostatic valve shuts the flow when the lines warm to about 90 deg or so. This works well -- I had a system installed in my home, and a 3 or 4 min wait for hot water changed to about 20 seconds. If this is your problem, go look into this. You install it at the furthest fixure, and thus have hot water available in all the lines. It does use a bit of energy, as you're constantly replenishing hot water that's cooled, but you don't waste water (the cold water line empties back into the tank). A timer allows you to limit this usage to times (say morning and evening) when you'd like instant HW available. Read Less
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Asked by
Atlanta, GA
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Home Improvement Profile: DIYer
May 20, 2014
Answer: 
The Tankbooster does not spead up delivery to Faucets, you would need to purchase a recirculating pump to increase delivery speed to fixtures. The Tankbooster will increase the amount of usable hot water you get out of your tank, you could add a Tankbooster and a recirculating pump to get more hot water and a faster delivery.
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Asked by
Wichita Falls TX
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April 8, 2014
Answer: 
NO unless you add a recirculation pump which it is designed to use optionally.
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Asked by
Arlington, TX, USA
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March 12, 2014
Answer: 
NO, it may even take a tad longer but it will not burn you when it gets there.
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Asked by
Skagit County, WA, USA
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Home Improvement Profile: Professional
February 3, 2014
Answer: 
No, it is not a recirculation device.
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Asked by
Olathe, KS, USA
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Home Improvement Profile: DIYer
January 24, 2014
Answer: 
This equipment does not add pressure to the existing line to help speed up delivery of hot water.
You can request from your local water company that they come out and adjust your pressure up or down.
This just helps increase the hot water and cuts the reheat time by using a cold water addition thus cutting the amount of hot water used and cuts the heat time of the hot water. It does not cut the hot water
Read More
This equipment does not add pressure to the existing line to help speed up delivery of hot water.
You can request from your local water company that they come out and adjust your pressure up or down.
This just helps increase the hot water and cuts the reheat time by using a cold water addition thus cutting the amount of hot water used and cuts the heat time of the hot water. It does not cut the hot water it just adds cold water to streach the hot water. It works great and so far no one knows the device is in place and operational.
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Asked by
Douglassville, PA, USA
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December 10, 2013
Answer: 
yes, for sure. I felt a difference right away
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July 25, 2013
Answer: 
Yes. That's the first thing I noticed after installing this device. Normally, I would have to wait about 30 seconds before I get any hot water out of my faucet. Now, it's more like 15-20 seconds.
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Asked by
Sugar Hill, GA, USA
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July 24, 2013
Answer: 
No, the only factors that determine how long it takes for hot water to reach the faucet is the length and diameter of the water line connecting the faucet to the water heater (volume of water that is not heated in pipe) and the flow rate of the faucet.
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Asked by
Virginia Beach, VA, USA
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February 5, 2013
Answer: 
No - you would still need a recirculating pump system
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Asked by
Smyrna, GA
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January 4, 2013
Answer: 
No,but I noticed that there is a port for a recirculating pump built into the valve. You would have to purchase a recirculating pump separately and run the return line to the port an the side of the Valve. The tank booster is made to double the hot water capacity of your existing water heater.
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January 4, 2013
Answer: 
The TankBooster does not increase the speed of hot water delivery. Instead, it allows you to double the capacity of your usable hot water. This is achieved by turning up your water heater to 140 degrees F while still maintaining a safe outlet temperature of 120 degrees F. The TankBooster then takes the hot water from the newly set heater and mixes it with cold water until it can be released from the Read More
The TankBooster does not increase the speed of hot water delivery. Instead, it allows you to double the capacity of your usable hot water. This is achieved by turning up your water heater to 140 degrees F while still maintaining a safe outlet temperature of 120 degrees F. The TankBooster then takes the hot water from the newly set heater and mixes it with cold water until it can be released from the valve at a safe 120 degrees F.
www.tankbooster.com Read Less
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11 answers

How does the Tank booster work?

This question is from Water Heater Tank Booster
Asked by
Kabin
December 20, 2012
Is this installed @ tank or each faucet?
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Answers (11)

Asked by
South Hill, VA
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September 20, 2014
Answer: 
It is simply a mixing valve. your tank will be set at 140F, the valve will mix cold water for an output of 120F to your house...
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Asked by
Wichita Falls TX
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April 8, 2014
Answer: 
Tank
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Asked by
Skagit County, WA, USA
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Home Improvement Profile: Professional
February 3, 2014
Answer: 
Installed at the tank. It simply allows the tank temperature to be increased beyond what would normally be comfortable and when water leaves the tank, this device automatically mixes some cold water with the abnormally hot water allowing more hot water to be used before you "run-out" if that is a problem in your home.
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Asked by
Olathe, KS, USA
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Home Improvement Profile: DIYer
January 24, 2014
Answer: 
If I understand all I think I know about the booster is that it adds cold water to the already hot water and you do not use as much hot water thus cutting the gas or electric heat time of the hotwater tank. It does not effect the water at the faucet. You still get hot water.
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Asked by
Lubbock, TX, USA
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January 15, 2014
Answer: 
Installed at the water heater tank.
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Asked by
Douglassville, PA, USA
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December 10, 2013
Answer: 
You are instructed to raise the temperature settings on the hot water heater to 140 degrees and then the mixing valve will bleed cold water into the delivery and the result is a longer, more constant flow of 120 degree water at all points in the house.
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July 24, 2013
Answer: 
It is installed to the top of the tank.
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Asked by
Sugar Hill, GA, USA
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July 24, 2013
Answer: 
This is installed at the tank.
Turning up your water heater means that less hot water is mixed with more cold water to achieve the same temperature. If you want a 90 degree shower from a water heater set to 90 degrees, you use all hot and no cold water. If your water heater is set at 120 degrees and the cold water is 60 degrees, a 90 degree shower would use 50% hot and 50% cold. The higher your water Read More
This is installed at the tank.
Turning up your water heater means that less hot water is mixed with more cold water to achieve the same temperature. If you want a 90 degree shower from a water heater set to 90 degrees, you use all hot and no cold water. If your water heater is set at 120 degrees and the cold water is 60 degrees, a 90 degree shower would use 50% hot and 50% cold. The higher your water heater temp, the less water you draw from it to achieve the same tap temperature.
If the mixing of hot and cold is done at the tap, you run the risk of burning yourself if the hot water is turned on alone with no cold mixed in. The Heatguard does the same thing, increasing the hot water temperature so that less is needed, but mixes the cold water in the supply line rather than at each faucet. Thus turning on just the hot water at a faucet gives you 120 degree water, but that temperature is a mix of hot and cold water, so you are not drawing the entire water flow directly from the water heater. Read Less
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Asked by
Virginia Beach, VA, USA
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February 5, 2013
Answer: 
On the tank
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Asked by
Smyrna, GA
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January 3, 2013
Answer: 
The tank booster is designed to be installed directly on top of your water heater. The mixing valve is installed on the hot water outlet of your tank while the tee is installed on the cold water inlet. The valve automatically mixes hot and cold water so the water is always dispensed at a safe temperature even though the water in the tank is 140 degrees.
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December 21, 2012
Answer: 
The Tank Booster is installed directly on top of your water heater.
Tank Booster is a mixing valve that allows you to raise the storage temperature of your hot water tank to 140+°F. When that hot water from your tank enters the mixing valve, it is met by cold water fed from the brass cold water tee and connector hose.
Inside the valve, the cold water cools the 140+°F hot water from the tank to a 120°F. Read More
The Tank Booster is installed directly on top of your water heater.
Tank Booster is a mixing valve that allows you to raise the storage temperature of your hot water tank to 140+°F. When that hot water from your tank enters the mixing valve, it is met by cold water fed from the brass cold water tee and connector hose.
Inside the valve, the cold water cools the 140+°F hot water from the tank to a 120°F. When the hot water cools to 120°F it is then safe to distribute to rest of the house.
This process effectively doubles the usable hot water from a water heater tank. Each time hot water is called for, less hot water will need to be drawn from the heater - increasing the amount of hot water still available for longer showers, loads of laundry, and dishes to be done.
For more information and an installation video visit:
www.tankbooster.com
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5 answers

Does the tank booster replace the 1-2 gallon tank I currently have installed above my water heater?

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January 18, 2016
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Answers (5)

Asked by
Rosemount, MN
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Home Improvement Profile: DIYer
August 8, 2016
Answer: 
I would say no. The booster is just a temperature controlled valve. When hot water passes through, it causes the vale to start opening which induces cold water into the mix from the braided hose connection. The idea is that you set your water heater to a higher than normal/comfortable water temp, and then the "booster" actually mixes in cold water as it leaves the heater to bring the temperature back to Read More
I would say no. The booster is just a temperature controlled valve. When hot water passes through, it causes the vale to start opening which induces cold water into the mix from the braided hose connection. The idea is that you set your water heater to a higher than normal/comfortable water temp, and then the "booster" actually mixes in cold water as it leaves the heater to bring the temperature back to a comfortable level (120-125degrees or whatever you set it too).
If you insulate your water heater, doing this results in the heater running less often to maintain the internal water temp, and when it runs it does so for just a couple minutes more. The net result is a slight savings on gas usage (or electric if that's what you have) and you end up with a significant additional amount of hot water. On my unit with a 30 gallon heater, we'd run out of hot water after 3 showers in the morning (4 adults). After adding the booster, the forth shower might be a bit less warm then I'd like, but it was still warm at least. The booster basically extends the amount of hot water you have available, and that's all it does. This ends up being cheaper than buying a larger water heater, or an on-demand heater that generally costs a lot more. Read Less
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Asked by
North Carolina
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Home Improvement Profile: DIYer
May 16, 2016
Answer: 
No, it does not replace the 1-2 gallon tank you currently have. This strictly works with temperature control.
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Asked by
Uniontown, PA
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Home Improvement Profile: DIYer
March 20, 2016
Answer: 
Do not remove 2 gallon tank, because it is an expansion tank. As hot water heats up, it builds up pressure. There is a rubber bladder in that small tank that expands under pressure and keeps the pipes and water heater from leaking or rupturing. The booster attaches right at the tank where the present lines screw in. Search "expansion tank" to make sure that what I am describing is what you have. Good Read More
Do not remove 2 gallon tank, because it is an expansion tank. As hot water heats up, it builds up pressure. There is a rubber bladder in that small tank that expands under pressure and keeps the pipes and water heater from leaking or rupturing. The booster attaches right at the tank where the present lines screw in. Search "expansion tank" to make sure that what I am describing is what you have. Good luck! Read Less
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January 28, 2016
Answer: 
Yes, it will replace.
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Asked by
new england
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January 27, 2016
Answer: 
probably not.
The 1-2 gal tank above the heater is a thermal expansion tank, that gives the water place to expand as it heats (yes, hot water volume is larger -- e.g. lower density -- than cool water). This tank is half filled with air, and gives keeps the water pressure constant as it heats up.
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Customer Reviews

Rated 4.5 out of 5 by 42 reviewers.
Rated 5.0 out of 5.0 by Well worth the money !! I was in need of replacing my 15 year old water heater and while researching units to buy I saw the ad for this Tank Booster and I liked the reviews and thought what the heck. I bought a new Rheem 40 gallon gas heater and the sharkbite fittings along with the Tank Booster, I call it a blender. I installed it all myself and I'm no plumber, Very good quality and it was great to adjust the water temperature at 125 at the faucet so no more scalding while adjusting the water temperature in the shower or sink. I really recommend this product. For $90, it's well worth it I think. I wouldn't use it in a hard water area without a softener before the tank... Arvada Colorado January 10, 2016
Rated 5.0 out of 5.0 by More Hot Water, with a Lower Cost This is a great mixing valve and simple to install. But first I like to fill in some back ground, We have a 50 electric duel element heater and if we would to rise our dinner pots and dishes and followed it with our nightly hot bath we always had cold water running before the tub was filled and the water was already set at 135*. After installing the Booster and setting the temp. to 140*, we now rise the pot and all head off for the bath and still have hot water running as the lever hit the overflow. Now that's a boost in my book, with more hot water available for less cost. It may be hard to figure lower cost so let put it this way, before we drained the tank completely, and had to heat a full 50 gals, now we use 30 gals of hot water mixed at the valve installed, so you are only heating the 30 gals.... science... As far as the install goes it's straight forward, turn off power or gas to the water heater and then water to the house, open the valves to relieve pressure at the sinks. SAFTEY FIRST Next, remove the lines on top of the water heater and install the tee to the cold inlet and the mixing valve the hot outlet. Follow by the crossover cold water line from the cold to the mixing valve, three are filter screens, like those for line on washer lines, that need to be in place. The valve is per set for the 120* outlet temp, so all that is left is adjust the water to at lease 140*, turn on the water and bleed air out, check for leaks, before turning back on the power and/or gas. Last step is to check the water temp at the sink, pick one close to the water heater and the farthest, my our double check to check two, temp should by 120 to a top of 125*. Very last detail is to place the sticker that comes with the valve showing the tank is set to 140* and a valve (sink) temp of 120*. My case is by my figuring is a 75 gal capacity now out of a 50 gal electric water heater and I've also added one to my other place with a 40 gal gas water heater with same type of results. In my book, Can't go wrong with this 'Tank Booster". February 1, 2016
Rated 1.0 out of 5.0 by mixed feeling Certainly the product received does not look like the product in the photo; it was not received with a white knob. why they cannot sell a product that looks like what they show? the idea and the explanation on the product feature is good and make sense; pending the results from my own experience after 2-3 months. i gave it 1 star because of the product sold looks different from what they are still showing until now. why no one pays from the seller's side pay any attention. therefore, i cannot recommend or not recommend this product until tested & photo of product reviewed. April 26, 2016
Rated 5.0 out of 5.0 by This will add whole house anti-scalding to your home and deliver hot water sooner. After installing the Cash Acme Heatguard Tank Booster along with a new natural gas hot water heater, I was impressed just how well it actually improved hot water delivery throughout our house. Another benefit the Cash Acme Heatguard Tank Booster provides is whole-house anti-scalding, by its factory default heat setting of 120 degrees, protecting everyone in your household from scalding burns. Depending on your existing pipe fittings, you may need to purchase additional hardware to complete the installation of the tank booster. April 11, 2016
Rated 5.0 out of 5.0 by Hot Water lasts longer My family of 9 can all take showers now, without the last people getting cold water. March 22, 2016
Rated 4.0 out of 5.0 by Easy to install To be honest, I'm not sure if my application is 100% inline with manufacturer recommendations. I have two bathrooms in my home and one shower takes forever to get hot water. Since we're in a drought, I wasn't comfortable letting the hot water run in order to let it heat up. I thought I'd give this a shot to see if it might help "boost the speed" of hot water delivery. I don't believe installing this item helped with my particular need (but I was using it in a non-conventional way). I will say that I do notice the hot water available during my existing showers absolutely lasts longer than before (an added bonus which meant installation wasn't a total waste). If you're looking to extend your available hot water, highly recommend. January 9, 2016
Rated 5.0 out of 5.0 by Awesome Device! Saved Me Hundreds! I have a whirlpool corner tub which takes 88 gallons of water to fill up. Since I have a 40 gallon electric hot water tank, I knew I would have to get more hot water supplied to use it. While at the store, Larry the plumbing pro there suggested I try this. I had been deciding on a 60/80 gallon tank to replace the 40, or perhaps adding another 40 in series to give me enough. Since both of these options were very costly and time consuming, I took his advice to try it and return it if it didn't work for me. I had tried to fill up the tub after I installed it with just the 40 and no booster. The tub filled up 3/4 of the way and ran out of hot water. I then tried to fill up the tub the rest of the way with cold but by the time the tub filled up, the water was way too cold. I came home, installed the booster in half hour tops, easy as could be, no problems. I cranked both elements up to 140 degrees and waited an hour to make sure the water had heated up. I then went and filled the tub and it filled perfectly! It not only filled the tub, but I still had hot water! A few days later, my son used it, then my wife an hour after he finished, and when the tub was full I still had hot water in the kitchen to wash pots! I would absolutely recommend this miracle device! I have seen a few bad reviews here for this product and after reading them, I am positive they did not install it correctly! March 20, 2016
Rated 4.0 out of 5.0 by Great solution to a tough problem. So your water heater doesn't seem to last long enough; guests, teenagers, large whirlpool tub. And you tried the "turn up the temperature some more". The problem is it makes it difficult to safely control the temperature at each faucet in the house, especially for guests that are unaware. You could replace your water heater with a larger unit. That's expensive. Solution: The mixing valve kit. It includes everything you need for a basic installation to most any type of tank water heater. I have a small electric heater for a single bathroom. I installed this unit and it worked as promised. The instructions, and especially the pictures are very good and very accurate. Follow them carefully. But when you disconnect and reconnect the water supply lines you will notice that the valve takes up about 6 inches of space on the hot side and 3 inches of space on the cold side. So if you do not already have new flex supply lines attached, you may need more parts and make some adjustments to reconnect the supply lines. In my case, I had recently replaced the cold supply that was an older copper flex line with a braided stainless steel supply line. It was flexible enough to handle the 3 inch difference. But on the hot side, I had to bend the 18" copper flex line a lot to make it fit back onto the mixing valve outlet. I will be replacing that supply line soon. It's best to assume you will need to replace your tank supply nipples (preferably with heat trap dielectric nipples), and your supply lines. I even replaced my shutoff valve from a gate valve to a ball valve. Once that was done, I flushed my tank, flushed my lines, and adjusted the temperature. The valve is set for 120 degrees, but I wanted 130. So I set that at 130. I am not sure it will adjust above 130 degrees. I then set my tank at 150 degrees, and left the allen wrench in the valve for future adjustments if needed. One thing I would do differently: I would set my tank to my new temperature (150 degrees) before installation and verify temperature with a temperature probe because water heater dials are not very accurate, and you cannot check the internal temperature once the valve is installed. I decided to clean the strainers to be sure they were clean from the flush. It's important that you depressurize the valve by turning the cold supply off and opening a hot faucet to relieve pressure. I did not open a hot faucet and when I removed the cold supply hose from the mixing valve, the check valve popped out of the valve body. While tech support was easy and fast to reach, I had to figure out how to reassemble the parts myself. (yes it works again.) I'm glad I checked because the screen had debris in it. The thermo-strip was installed but will be useless as I will be insulating the pipes. And it appears only Home Depot will warrant this unit as the manufacturer requires licensed plumber installation only. If your water heater is old, you're better off replacing it with a larger unit. But if you have a newer tank water heater in good condition then you can use this tank booster mixing valve kit to increase your hot water supply. Just be ready to buy new supply lines. February 8, 2015
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