Falcon Stainless EXPT-2 Thermal Potable Water Expansion Tank 2.1 Gal with Butyl Bladder/Polypropylene Liner and Stainless Steel 3/4-Inch Male Thread Connection for up to 50-Gallon Water Heaters

Nicely made hardware. Follow installation instructions. At one point it suggests not installing the tank sideways because of the stress it's weight, when filled with water, would have on the copper pipes and solder joints. 8.3 lbs per gallon of water. 2.1 Gallon (if the bladder fails?) is 17.7 lbs.In a later section it shows a sideways installation with a SUPPORT for the tank. Support the tank if you must install it sideways.Vertical installation is urged. Nozzle up or nozzle down? Nozzle down/tank up above my electronics-laden Heat Pump Water Heater, looks easy enough but what if something should leak onto the electronics? No. Not above the heater in any direction for me.From other reviews I concluded nozzle down/tank up is ideal because even if the bladder eventually fails, the air trapped above will still have a cushion effect which will help keep the system pressure lower during expansion. I built a wooden framework secured to the basement ceiling joists off to the side of the HPWH. The tanks rests in it with the connecting flex tube (from the nozzle) joined to a copper T-fitting. I left enough space at the top to access the schrader valve for occasional checking and refilling with air. Our neighborhood around 55 psi.

I ordered this to retrofit a house that had a water pressure regulator but no expansion tank, so the pressure would skyrocket when the water heater called for gas. Same-day delivery was awesome. I received the tank before I had the connectors. The tank arrived in good condition, and it appears to be of good build quality. Biggest issue is the lack of a decent tank mounting solution in the industry as a whole. I ended up purchasing a claw bracket from a non-Amazon supplier. Make sure to use tape and/or pipe dope when hooking up. I used brass fittings and stainless steel corrugated hoses. I mounted the tank vertically with the air valve on the top to make it easier to deal with when it eventually fails. No leaks so far.

I was pulling my hair out, trying to keep my water heater pressure valve from leaking. It was a new water heater, so it certainly shouldn't been leaking. The old one was replaced before we purchased our house, because it was leaking as well. I bet it was the same issue. Our water pressure is about 60 psi and our water meter acts as a check valve. So, when the water heater heats the water up, it expands and has to go somewhere - so out the safety release valve it goes!

So far seems to work well. Easy to replace old unit. Maker sure to set pressure to house incoming water pressure. So buy a guage that screws onto the water heater drain valve. Then pump up diaphragm pressure with bike pump to that pressure before instillation. Think the unit came set at 45psig but increased to 65psig. Used car tire plug in pump to increase pressure. After instillation the water heated relief valve stop popping once per day.

Don't buy Watts water Expansion tank . Do yourself a favor buy Falcon better quality, better made, better warranty . I installed a new Watts Expansion Tank 2 years ago , look at the pictures, the tread complete rust from the inside out, and was leaking water; I am on city water , and yes I had the correct pressure on the tank, the same from my city water supply. I like Falcon because the tread is made out stainless , plus you get 5 year warranty . Watts is junk, the first one failed the first year the same way, and you only have one year warranty. No more Watts for me .

It’s a great way to insure your fittings don’t explode or your water heater doesn’t get damaged. Do your research to see why you really need one of these tanks in a closed house water system (with a check valve or pressure regulator on the house supply).This particular tank is well made and I can’t see anything wrong with it. I’ve added this to my yearly to-do list of things to check (along with flushing the 49-gal water heater of course.). Time will tell if this one lasts like it should.

Had problems with water heater popoff pooling water. I installed this tank and problem solved. Had service man out, said pressure was going high when heater was bringing water back to temp. He put on gauge and increased heater temp, pressure increased from 40 psi to over 125 psi. Installed tank, bought gauge and watched pressure. Our pressure has never gotten over 55 psi since. You also need if you have pipes clanging when you shut off water.

We put this in at our old house, when we moved to our new place we chose the same product to install. Very satisfied with the tank. Also fantastic customer service. Our USPS delivered it to the WRONG place- I mean miles away and would not go get it for us! The company promptly sent a replacement at no cost to us.