Flapper
Member
Can someone identify what this part is and what it is for?
Hmm so can I use only one of these valves to protect the entire plumbing system?It is a pressure relief valve, NOT a T&P valve so it can be anywhere in the system. The instructions were written by someone who uses English as second language.
I'm pretty sure the valve was leaking, not that the pressure was high. We have a PRV.If your water pressure gets high enough to open that valve, it's doing its job. But, if that is the case, you really need a pressure reduction valve for your system as 80psi is the max you should have in a typical system. That would also require an expansion tank as the PRV creates a closed system. You might be able to get by without one with a tankless system, though, but still should have a PRV.
I'm pretty sure the valve was leaking, not that the pressure was high. We have a PRV.
It was a constant flow and opening and closing the valve reduced it but didn't stop it; I'm sure the water pressure was not high enough. If I knew it was a pressure relief valve then I would've fixed it or replaced it or something, but I thought it was just a purge valve thanks to the terrible instructions. I'll install the other new valve that wasn't used.That's what everybody says before the T&P valve gives way.
Or worse: "The safety valve was leaking so I removed it." "The safety valve was leaking so I wired it shut/plugged it/filled it with putty, etc."
These are the people who get the water heater through the roof:
If that is so then I need to put it on the cold side. But I don't see why theres an arrow because the water goes straight through it; it doesn't have a check valve in it.If it were a T&P valve, it would need to be on the outlet as it senses both temperature and pressure. Since it's just a pressure valve, it really doesn't matter, but you do need to adhere to the water flow arrow on the thing when installing.
Maybe your expansion tank is bad. When you knock on the side while you are dribbling water from a faucet somewhere, the tank should sound empty.We have a pressure regulating valve so it shouldn't be so high. But I think it is set to its maximum. The range is 25-75 so 75 is the maximum. The pressure shouldn't be so high. But maybe the pressure only increases a little bit (like 10-2o) and gets near enough to the relief valve's rating causing it to leak.
This is awkward, but...
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