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20 Gal. Horizontal Well Tank

  • Horizontal design can fit into small spaces for convenient use
  • Designed to maintain air charge for many years
  • Polypropylene liner prevents odor from being absorbed into water
  • See More Details

Frequently Bought Together


Product Overview

The Water Worker 20 Gal. Horizontal Pressurized Well Tank is pre-charged and designed to maintain its air charge for years to provide easy upkeep. The tank utilizes a thick diaphragm to keep water separate from pre-charged air and to help reduce air loss. This tank also features a steel shell to support the water weight, a polypropylene liner to help prevent taste or odor from being absorbed into the water and deep-drawn steel construction for durability.
  • Horizontal design fits into tight spaces with very little head room
  • Polypropylene-lined steel supports water weight to ensure water never sits in loose-fitting vinyl or rubber bags that can fold, crease and wear, liner does not require scheduled replacements for long-lasting use, formed liner fits the steel shell for added durability
  • NSF certified for clean safe drinking water
  • System Connection: 1 in. NPTM threaded metal connection with stainless steel insert and connection does not contain plastic that can cross-thread or crack
  • Constructed of deep-drawn steel for durability
  • Sizing - count the number of water fixtures in and outside the home and multiply that # by 3; fixtures include faucets, spickets, showerheads, dish washer, washing machine, etc. for hot tubs and sprinkler systems add 1 to 2 fixtures for each; there are no disadvantages to having a larger well tank as fewer pump cycles will extend pump life and save money on electricity; tank stores a buffer of water in case of power outage
  • Thick diaphragm keeps water separate from pre-charged air and helps to reduce air loss
  • Molded diaphragm offers an ideal fit, sits on top of the water and will not fold, crease or drag against the steel shell
  • 20 Gal. of total volume; plain or galvanized tank equivalent of 42 Gal.
  • Pre-charged to 38 psig; 100 psig maximum working pressure
  • Maintains air charge for years to provide easy upkeep
  • 1 in. NPTM system connection
  • Well tanks are not be used in Reverse Osmosis systems
  • Well tanks are not be used for water expansion in thermal (water heater) or hydronic (boiler/solar) systems
  • Tank size: 30 in. L x 15 in. W x 16 in. H
  • California residents

Info & Guides

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Equivalent Capacity (gallons)
Product Depth (in.)
Product Diameter (in.)
Product Height (in.)
Product Width (in.)


No Additional Features,Pre-Charged
No Additional Items Included
Maximum inlet pressure (psi)
Pack Size
Pipe Size
1 in.
Product Weight (lb.)
Tank Material

Warranty / Certifications

Manufacturer Warranty
5 years

Questions & Answers


Will this work with a a submersible?

Asked by jackrabbit March 6, 2021

I bought this tank for a traditional shallow well pump. If you are using a JET pump, you will need a pressure shut off switch. these types of pumps are very powerful. Hope this helps.

Would a 20 gal.electric tankless water be big enough for 2 adults.

Asked by Nettie January 20, 2021

You will get a lot of pump cycles. When I moved into my house all that was there was a 20 gallon. I added a 2nd tank to cut down on pump cycles. My pump is in my house and not in my well.

What is the draw down of this tank?

Asked by Greg December 15, 2020


Vertical pressure tanks don't need a pump. Does this horizontal tank have to have a pump? ...or...

Asked by crispyy October 1, 2020

I have a pump and is running very well. If you don't put a pump I don't think that you can have a pressure in the system.

I connected every thing , and trun the plum on, but the water tank does not store any water, because the plum was on and off just in 1-2 seconds,

Asked by Kenny September 16, 2020

The cut-on pressure for the well pump is 30 psi, so the pressure of the tank should have a pressure of 28 psi. If your well tank is on a 40/60 pressure switch, your pressure setting should be 38 psi. This pressure represents the tank empty of any water, as when there is water within the tank, the pressure will increase. Sounds like the top end of your pressure switch is set too low.

Can you show the bottom of this particular particular water work in horizontal tank

Asked by Lynn August 29, 2020

Can this tank be installed on vertical position. i'm not going to put it on the floor. i'm going ...

Asked by marcos August 2, 2020

If you want to install a water pressure tank vertically then buy a vertical tank. This one is for horizontal use. Installing either one wrong puts too much weight on the bladder inlet causing it to fail.

Just bought this water worker tank and it has a clip in the intake fitting. Does this stay in?

Asked by Trey July 7, 2020

Yes. The clip stays in.

Does this have a pressure valve?

Asked by Becky December 26, 2019

No it doesn't Becky.

Why does the water keep shuttling off and then turning back on. It's like it's not keeping the pressure

Asked by Trowe October 6, 2019

You have to turn the pressure down in the tank

20 Gal. Horizontal Well Tank - page 2

Customer Reviews

  • 4.3
    out of 163 reviews
  • 88% recommend this product
Filter by:
Showing 1-10 of 163 reviews
Easy to install and lightweight.
Easy to install and lightweight.
by Martin
When everything you read says 1 inch, but what you received is 1-1/4 inch on the tank, it leads o...
When everything you read says 1 inch, but what you received is 1-1/4 inch on the tank, it leads one to ask, "if they can't get that right what else is wrong with the tank?". I have seen others comment about this same problem. I find it amazing that somebody at HD hasn't picked up on this discrepancy. I think it will work out for us. There is plastic sticking out of the tank where the 1-1/4 inch pipe connects. I assume this ¿clip? has something to do with the bladder, but I couldn't find any information on it. A red cap would have been nice to help prevent rust and to keep critters and debris out of the tank. Other than that, everything else seems to be in order.
by Genos
3 people found this helpful
Rusted out in three years.
The previous tank had lasted at least 10 years. I bought this tank in March of 2017. Installation was easy, but it began to lose air pressure slowly in 2019. This year it failed completely. The warranty is worthless; Home Depot won't deal with it, and I'm not going to jump through hoops for the manufacturer.
by scrappy
3 people found this helpful
Works like it should
Replaced a 7 gallon utiltech tank with the 20 gallon water worker. Easy install, now pump runs less than half as often
by KyDiyGuy
1 person found this helpful
Tank was well made, not difficult to install
I installed the tank using 1 inch pvc. The old tank was 35 + years old, filled with crude, I should have changed the old tank years ago.
by John
5 people found this helpful
Replacement tank
The water tank was a different brand than my original, but was able to install with no changes to the plumbing fittings.
by Mike
5 people found this helpful
Great Item, easy to install and works well!
The tank had easy to follow instructions and was a breeze to install. The metal bracket to mount the pump upon was a desirable feature that influenced my choice of this item. It works very well with a shorter cycle time than my previous tank. A follow up question to the manufacturer was professional and answered all my questions.
by gbtinmi
12 people found this helpful
We have great water pressure...
We have great water pressure
by Floyd
The last water worker I bought was only 2 years old with a 5 year warranty the internal bladder b...
The last water worker I bought was only 2 years old with a 5 year warranty the internal bladder broke not too impressed would like to get some information on how to get reimbursed for the product
by Badtank
Couldn’t use it had to bring it back and exchange...
Couldn’t use it had to bring it back and exchange for a different one.
by HomeDepotCustomer
Showing 1-10 of 163 reviews