I am Yu
USA
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Joined: 08/10/2013
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I'm running on internal water (not city water). I don't leave the water heater turned on all the time (too wasteful to do so) and when I turn it on it raises the pressure in the whole plumbing system way too high, and I get water leaking from the toilet onto the bathroom floor. The only way I've found to deal with this is to shut off the pump and briefly open a faucet every 10 minutes to relieve the pressure, until the heater gets hot and the pressure stabilizes, which gets pretty annoying.
There is a pressure relief valve on the water heater, but apparently it's only intended to protect the heater tank, and opens at too high a pressure to do anything for the plastic plumbing.
Is there some kind of relief valve that opens at a lower pressure, which I could install somewhere in the system and have it drain overboard?
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2oldman
NM
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Joined: 04/15/2001
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I have the same issue. I turn off the pump and leave a HW tap open. When the tap starts to drip I turn off the heater.
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Sjm9911
New Jersey
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Intresting problum, maybe try to turn down the tempature of the water heater. Less heat , less expansion , less pressure, maybe.....just an idea.
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Boon Docker
Mountain Foothills of Southern Alberta
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Sounds like a faulty check valve on the cold water line at the water heater.
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Dusty R
Charlotte Michigan 48813
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I like installing a small bladder type pressure tank. It makes the whole water system work nicer.
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Lynnmor
Red Lion
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Drain the water heater and refill it, that will re-establish the air pocket in the tank and allow for expansion. See your water heater owners manual for more information.
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schlep1967
Harrisburg, PA
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Lynnmor wrote:Drain the water heater and refill it, that will re-establish the air pocket in the tank and allow for expansion. See your water heater owners manual for more information.
Or just turn off the pump and drain a small amount out. Then turn the pump back on without using 6-10 gallons of water.
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time2roll
Southern California
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A small accumulator will solve the issue. Yes I had the same problem.
Amazon - Shurflo 181-201 Accumulator Tank $38
This creates a permanent air pocket.
Mine was in the RV shop twice for several weeks for a mystery water leak. Never found. I had to dig for this myself while camping. I guess the dealer did not think to cycle the water heater to find a leak.
* This post was
edited 01/12/21 11:14am by time2roll *
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4x4van
California
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Lynnmor wrote:Drain the water heater and refill it, that will re-establish the air pocket in the tank and allow for expansion. See your water heater owners manual for more information.
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Lynnmor
Red Lion
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schlep1967 wrote:Lynnmor wrote:Drain the water heater and refill it, that will re-establish the air pocket in the tank and allow for expansion. See your water heater owners manual for more information.
Or just turn off the pump and drain a small amount out. Then turn the pump back on without using 6-10 gallons of water.
I didn't want to get onto it, but since the air dissolved into the water tells me that draining and flushing is way overdue.
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