Model # DET-5-M1-HD

Internet #205556413

Store SKU #594885

Watts 2.1 gal. Pre-Pressurized Steel Water Expansion Tank
0098268051957

Watts

2.1 gal. Pre-Pressurized Steel Water Expansion Tank

$39.97 / each
If you buy 3 or more
$35.97 / each

Product Overview

This expansion tank controls thermal expansion of water in open domestic hot water supply systems. It absorbs the increased volume of water generated by the hot water heating source. Its' pre-pressurized steel tank uses an expansion membrane to prevent air/water contact for long system life.
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Product Overview

This expansion tank controls thermal expansion of water in open domestic hot water supply systems. It absorbs the increased volume of water generated by the hot water heating source. Its' pre-pressurized steel tank uses an expansion membrane to prevent air/water contact for long system life.
  • Controls thermal expansion of water in open domestic hot water supply systems
  • Keeps system pressure below relief setting of relief valve
  • For use with all types of direct-fired water heaters
  • Rubber diaphragm flexes when water heats
  • Compatible with gas, oil and electric heaters
  • Steel construction with a blue outer finish
  • Tank fitted with expansion membrane to ensure long system life by preventing air and water contact
  • Maximum 150 psi
  • Note: Product may vary by store

Product Overview

Model #: DET-5-M1-HD
Sku #: 594885
Internet #: 205556413

This expansion tank controls thermal expansion of water in open domestic hot water supply systems. It absorbs the increased volume of water generated by the hot water heating source. Its' pre-pressurized steel tank uses an expansion membrane to prevent air/water contact for long system life.

California residents: see   Proposition 65 information

  • Controls thermal expansion of water in open domestic hot water supply systems
  • Keeps system pressure below relief setting of relief valve
  • For use with all types of direct-fired water heaters
  • Rubber diaphragm flexes when water heats
  • Compatible with gas, oil and electric heaters
  • Steel construction with a blue outer finish
  • Tank fitted with expansion membrane to ensure long system life by preventing air and water contact
  • Maximum 150 psi
  • Note: Product may vary by store

Info & Guides

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Specifications

Dimensions

Product Depth (in.)
12
Product Height (in.)
8.9
Product Width (in.)
8.0

Details

Finish Family
Blue
Material
Steel
Product Type
Expansion Tank
Product Weight (lb.)
5.1lb
Returnable
90-Day

Warranty / Certifications

Manufacturer Warranty
Watts (the "Company") warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original shipment.

Specifications

Dimensions

Product Depth (in.)
12
Product Height (in.)
8.9
Product Width (in.)
8.0

Details

Finish Family
Blue
Material
Steel
Product Type
Expansion Tank
Product Weight (lb.)
5.1lb
Returnable
90-Day

Warranty / Certifications

Manufacturer Warranty
Watts (the "Company") warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of original shipment.

Questions & Answers

pre -pressurized at 50 or 60

pre -pressurized at 50 or 60
Asked by: boris
The factory fill is 40 p.s.i. There seem to be conflicting recommendations as to whether the tank pressure should be increased if the line pressure of your water system is higher than that. I have 80# line pressure in my home. That, when applied to the expansion tank, should result in about half the tank volume being water, and the other half (away from the inlet nipple) should be compressed air. As long as the membrane that separates water and air is intact, that should work just fine. The inlet nipple on current product is stainless steel, which is an improvement over earlier versions. In response to one posting, the Watts instructions says the unit can be mounted vertically, with the inlet either on top or on bottom just by its nipple. If mounted horizontally, it needs external support. Water weighs 8 pounds/gallon, so the worst-case weight could be approaching 20 pounds if the tank were mounted horizontally and the membrane failed. Best case is mounted nipple-up, and the tank is so labelled, but nipple-down is a close second
Answered by: Rusty
Date published: 2017-10-16

Can this expansion be installed horizontally?

Can this expansion be installed horizontally?
Asked by: Mike
According to the Watts installation manual "yes". Upwright and downward as well.
Answered by: Ashpole
Date published: 2017-10-05

Do you need a plumber to install, or is self installation easy?

Do you need a plumber to install, or is self installation easy?
Asked by: Jo
It's straightforward to install this device, but you MUST NOT MIX IRON/STEEL/GALVANIZED AND COPPER PIPE THREADS. Search on Wikipedia for "Galvanic Corrosion" to learn more. Replace your iron/steel fittings with brass or copper fittings, or else you will have rust in your water, and clog or damage downstream fittings, like clogging the shower heads.
Answered by: RustyTennessee
Date published: 2017-07-07

What is a pressure regulator and how it works

Asked by: tony
It's a device to help maintain the pressure steady in the line. Usually a valve with a membrane, can be factory set or adjustable.
Answered by: casbahti
Date published: 2017-09-12
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Customer Reviews

2.1 gal. Pre-Pressurized Steel Water Expansion Tank is rated 4.8 out of 5 by 80.
Rated 5 out of 5 by from My old Utilitech expansion tank failed, the expansion bladder failed after about five years and I... My old Utilitech expansion tank failed, the expansion bladder failed after about five years and I decided to try a different name brand in hopes for superior service over my old unit. Went on without issues, corrected the overpressure release of water that was occurring because the old tank went bad. Will be inspecting this every two years along with the tank anode. The Watts water pressure tester showed an overpressure occurring when the tank heated a full fill of water from tap temperature to hot. From 75 psi to over 160. A disaster waiting to happen. With the new tank, PSI never gets above 80 even on a full cold tank heat up.
Date published: 2017-05-10
Rated 5 out of 5 by from It was pre-charged to 80 psi and tested my water pressure at 120 psi The instructions say never e... It was pre-charged to 80 psi and tested my water pressure at 120 psi The instructions say never exceed 80 psi so it works and corrected my thermal check valve from leaking on my new water heater. I did bend it slightly at the bottom of the tank after I installed it cause I used it as a tool and pushed on the tank to tighten up the 3/4" elbow that was slightly leaking,,yea, I was dumb doing that but even when it bent and caved in where the fitting meets the tank it didn't harm it or leak. I do have a "closed water system" with a check valve on my water main and you'll need one if you have the same thing.
Date published: 2017-10-15
Rated 5 out of 5 by from From a Pro Great tank for managing expansion from a water heater. DIY folks pay attention to instructions. These tanks come pre pressurized to 40 psi. If your city pressure runs higher the tank needs pressure added to a level equivalent to your maximum city pressure. Failure to pre pressurize can result in a premature bladder failure. Expansion tanks rarely last more than 10 years. I install a 3/4" ball valve between the tank fitting and the cold water line on which the tank mounts. Should the tank ever need to be replaced this makes the process easier.
Date published: 2017-08-01
Rated 3 out of 5 by from This is the 1st time I've ever had one of these. I got it because I thought without it was causi... This is the 1st time I've ever had one of these. I got it because I thought without it was causing my water heater TPR valve to leak from water expansion, but the real problem was a faulty whole house pressure control valve. Now I can hear every time the water runs, ever since this was installed. Maybe I didn't set the pressure exactly right... I'll be checking it this weekend as maybe it needs a few more pounds of air. I assume it takes care of the expansion but I don't think that was ever really my problem...
Date published: 2017-08-30
Rated 4 out of 5 by from EASY to install. Just measure your house water pressure... EASY to install. Just measure your house water pressure (with a pressure gauge intended for this purpose) and inflate the bladder to the same number of pounds air pressure as your house water pressure, Inflate PRIOR to installation. YouTube shows conflicting info. on when to pressurize tank.
Date published: 2017-10-17
Rated 5 out of 5 by from My hot water heater didn't explode yet so I guess it's doing its job I have a backflow preventer ... My hot water heater didn't explode yet so I guess it's doing its job I have a backflow preventer on my meter so one of the water heat it can't push back into the city and needs the tank to expand as the water is heated.
Date published: 2017-10-11
Rated 5 out of 5 by from Worked exactly as intended. City installed a flow back preventer that cause my pop-off valve to l... Worked exactly as intended. City installed a flow back preventer that cause my pop-off valve to leak. Installed the expansion tank as instructed and everything is now working fine and the leaks have stopped.
Date published: 2017-08-08
Rated 4 out of 5 by from This expansion tank replaced the one I had, which had leaked water into the bladder, and made my ... This expansion tank replaced the one I had, which had leaked water into the bladder, and made my pipes bang. Installed after checking preset pressure to match my water pressure. Does what is supposed to.
Date published: 2017-06-28
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