Product images: Amazon listings
Written from the listing's specs, not from our own use · How we rate
If you're after 2.1 gallons of expansion room, the PEVEPEXE Expansion Tank (2.1 gal) delivers, with a 40 PSI pre-charge on top. A good match for a closed system with a check valve or a pressure regulator, rated 7.3/10 on its documented specs.
| Brand | PEVEPEXE |
|---|---|
| Category | Service kits, valves & parts |
| Connection | 3/4" MNPT |
| Pre-charge | 40 PSI |
| ASIN | B0GRZK1M1T |
Full listing title: 2.1Gallon Thermal Expansion Tank for Hot Water Heater, 3/4 Inch MNPT Connection, Potable Accumulator WaTER Heater Expansion Tanks
Rated from the listing's specs, no buyer reviews yet
What it's made for: a closed system with a check valve or a pressure regulator.
Two expansion tanks close to it on our rating, each with a dated price.
The size the listing states. On a closed system it takes up the water that expands as it heats; set the air charge to your house pressure with a tire gauge before it goes on.
What it has going for it
Pre-charged to 40 PSI. Set the air charge to match your house water pressure before it goes on; a tire gauge does the job.
Yes, if your house has a check valve or a pressure regulator at the meter: that makes it a closed system, and expanding hot water needs somewhere to go. This one holds 2.1 gallons, per the listing.
Maybe not, on an open system. Local codes differ, so your plumber has the last word.
The seller states, word for word, in the PEVEPEXE Expansion Tank (2.1 gal) listing:
Stops T&P valve leaks caused by thermal expansion in closed-loop systems.
Universal 3/4" MNPT connection fits most standard water heaters.
Fits residential heaters up to 50/60 gallons.
Their words and their figures, not our measurements. Whether it suits your heater is for the heater's manual to settle.
What the PEVEPEXE Expansion Tank (2.1 gal) listing names:
Check these figures against your heater's manual before you order.
On Sep 30, 2026, that price put it in the cheaper third of the 6 expansion tanks we have a recent price for.
The button opens the exact listing (ASIN B0GRZK1M1T), where today's price, stock and seller apply.
Our take
We like the PEVEPEXE Expansion Tank (2.1 gal) for 2.1 gallons of expansion room and a 40 PSI pre-charge. No buyer has reviewed it yet, so our 7.3/10 comes from the spec sheet alone. Honestly, the catch: the air charge has to be set to your house pressure first, or it does little. We'd pick it if your plumbing has a check valve or a pressure regulator; otherwise, put it next to the Eastman 60022 Expansion Tank (2 gal) first.
Before the PEVEPEXE Expansion Tank (2.1 gal) goes in your cart, check your water pressure: it holds 2.1 gallons and ships at 40 PSI, and the air charge has to match your house pressure.
Usually yes when there is a check valve or a pressure regulator at the meter; your plumber or local code decides.
It holds 2.1 gallons. The tank size follows your water pressure and the volume of hot water in the system; small residential systems often use the 2-gallon class.
It ships at 40 PSI. Match the air charge to your house water pressure before it goes on the line.
How the PEVEPEXE Expansion Tank (2.1 gal) stacks up against the closest alternative, the Eastman 60022 Expansion Tank (2 gal).
| Criterion | PEVEPEXE Expansion Tank, 2.1 gal | Eastman 60022 Expansion Tank, 2 gal |
|---|---|---|
| Our rating | 7.3/10 | 7.5/10 |
| Size | 2.1 gal | 2 gal |
| Rating | 40 PSI pre-charge | 40 PSI pre-charge |
Pick the Eastman 60022 Expansion Tank (2 gal) if you want our higher-rated option (7.5/10).
We rate it 7.3/10 (good). The rating comes from its documented listing alone, as no customer-review record is captured yet.
Its listing states 2.1 gallons of expansion room and a 40 PSI pre-charge. These are the seller's figures, not our measurements: whether it fits your exact heater is worth confirming first.
Do you need one: usually yes when there is a check valve or a pressure regulator at the meter; your plumber or local code decides. Size: it holds 2.1 gallons. The tank size follows your water pressure and the volume of hot water in the system; small residential systems often use the 2-gallon class. Air charge: it ships at 40 PSI. Match the air charge to your house water pressure before it goes on the line.
We link to the exact listing on Amazon, where today's price, stock and seller apply. It is an affiliate link, and it has no effect on the rating.
No, we haven't used it ourselves. Everything on this page comes from its listing, read line by line and weighed with our published formula.