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

Frequently Bought Together

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.

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

Details

Warranty / Certifications

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Customer Questions & Answers

is this expansion tank big enough for a 50 gallon hot water heater?

is this expansion tank big enough for a 50 gallon hot water heater?
Asked by: Renny
It is big enough but it also depends on the temperature setting of the water heater. A chart is included with the instructions to correctly size an expansion tank to the system.
Answered by: JD
Date published: 2017-02-07

Can this item be strapped to the wall?

I'd read that a competitors item cannot be strapped to the wall and wanted to know if this item can be attached to the wall as we will be using pex to conenct it to the hot water heater.
Asked by: thef150
I am not sure if it cannot be strapped to a wall. It may be for expansion of the pex lines. However, why not install it directly to the water heater like i did in one of my rental insatllations as shown in the attched photo and then run your pex tuybing from there? This way you get a solid mounting and can then run your pex lines. See photo.
Answered by: troubleshooter
Date published: 2017-05-08

WITCH SIDE TO INSTALL THE EXPANSION TANK HOT OR COLD SIDE

Asked by: TN55
Cold
Answered by: John
Date published: 2016-12-30

Is this "lead free" complaint?

Asked by: Mark
Yes, no lead is used to construct this tank.
Answered by: 1ProHandiman
Date published: 2016-11-22
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Customer Reviews

2.1 gal. Pre-Pressurized Steel Water Expansion Tank is rated 4.9 out of 5 by 48.
Rated 5 out of 5 by from Easy to install, and works like it should. My floor is dry no drips from the relief valve. Easy to install, and works like it should. My floor is dry no drips from the relief valve.
Date published: 2017-01-01
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 Had to replace water heater and I really didn't want to buy this as it looked complicated but it'... Had to replace water heater and I really didn't want to buy this as it looked complicated but it's now required and if I tried to sell my house it would have been an issue. The sales person at Home Depot showed me the fittings I needed. I bought a $10 water preasure gauge that I hooked to the hose outlet. Preasure was 70 pounds. Used a bicycle pump to put 70 pounds of air in the tank. Installing the fitting might have taken 15 minutes at most. Screwed the tank in the fitting turned the water on and no leaks! This could be a real pain if you had to do it later. I strongly recommend that you install when replacing water heater.
Date published: 2016-12-15
Rated 5 out of 5 by from Bought this to replace an older, identical tank whose diaphragm had failed. I did have to use my ... Bought this to replace an older, identical tank whose diaphragm had failed. I did have to use my bike pump to add more pressure (70# total) to it in order to match my water supply pressure--toward the end, that was a bit difficult (only because I was manually doing it, rather than using a compressor). Other than that, it installed easily in place of the previous one & is working perfectly. There's a great how-to article with photos on the Steve Jenkins site that walks you through all of the steps--in case you want to review it prior to doing this project.
Date published: 2017-01-24
Rated 5 out of 5 by from This tank is required for most home water systems that are isolated from the municipal water sour... This tank is required for most home water systems that are isolated from the municipal water source by a check valve. The tank has an internal bladder, is easy to install on the cold water service line, and does not need separate support straps if attached to the water system using galvanized iron or brass pipes.
Date published: 2017-03-08
Rated 5 out of 5 by from I was getting a high pressure of 110 lbs from 40 gal water heater during heating, up from 40lbs. ... I was getting a high pressure of 110 lbs from 40 gal water heater during heating, up from 40lbs. After I installed the expansion tank the pressure never went over 50 lbs during heating.
Date published: 2017-05-03
Rated 4 out of 5 by from Install was easy. I assume it's working as designed. I'd suggest checking the pressure of the ta... Install was easy. I assume it's working as designed. I'd suggest checking the pressure of the tank prior to installation. Mine was almost double the recommended pressure.
Date published: 2017-01-31
Rated 5 out of 5 by from Definitely replace this tank when replacing Hot water heater. Saves other appliances using hot wa... Definitely replace this tank when replacing Hot water heater. Saves other appliances using hot water and takes the knock out of system. Well built and easy to install.
Date published: 2016-12-27
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