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06-08-2019, 01:03 PM
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#1
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New Member
1972 Argosy 20
Anchorage
, Alaska
Join Date: May 2019
Posts: 3
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Hot Water Relief Valve
I have a 1972 Argosy Trailer. I just bought it and when testing all of the components I found that the relief valve in the hot water heater leaks when pressure build in the tank. I am able to find new relief valves but they are all 150psi and the one that I took out of the hot water heater is 125psi. Has anyone had luck finding a relief valve that is 125psi? Or has anyone changed these out using the 150psi one without any issues? 25psi in that tank is a lot of extra pressure.
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06-08-2019, 02:24 PM
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#2
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Moderator
Vintage Kin Owner
...
, ...
Join Date: Jul 2007
Posts: 11,696
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I bought one a few years ago from McMaster-Carr. It’s called a T&P Valve.
__________________
"One of the best lessons I've learned is that you don't worry about criticism from people you wouldn't seek advice from."
William C. Swinney
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06-08-2019, 02:53 PM
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#3
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Rivet Master 
1974 Argosy 26
Morrill
, Nebraska
Join Date: Nov 2009
Posts: 6,014
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How bad is it leaking?
Have you tried snapping it open and closed?
How old is the water heater?
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06-08-2019, 03:07 PM
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#4
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Overkill Specialist
Commercial Member
2020 30’ Globetrotter
2014 23' International
Dadeville
, Alabama
Join Date: Oct 2015
Posts: 4,516
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06-08-2019, 06:34 PM
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#5
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New Member
1972 Argosy 20
Anchorage
, Alaska
Join Date: May 2019
Posts: 3
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So you think using the 150psi instead of the 125psi that is in there is ok?
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06-08-2019, 06:35 PM
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#6
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New Member
1972 Argosy 20
Anchorage
, Alaska
Join Date: May 2019
Posts: 3
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I did try and it just caused the slow flow to become a fast flow.
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06-08-2019, 09:05 PM
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#8
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Rivet Master
2000 25' Safari
Davidson County
, NC Highlands County, FL
Join Date: Aug 2006
Posts: 4,493
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I checked the specs on both of the above valves. They are 150 psi.
__________________
Alan
2014 Silverado LTZ 1500 Crew Cab 5.3L maximum trailering package
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06-08-2019, 09:45 PM
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#9
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Rivet Master
2007 22' International CCD
Corona
, California
Join Date: Jul 2013
Posts: 9,180
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Hot Water Relief Valve
Main reason the valve is Installed is for over temperature issues. It’s not going to pop on over pressure. The PEX or the input regulator will most likely blow first.
__________________
Rich, KE4GNK/AE, Overkill Engineering Dept.
'The Silver HamShack' ('07 International 22FB CCD 75th Anniversary)
Multiple Yaesu Ham Radios inside and many antennae sprouting from roof, ProPride hitch, Prodigy P2 controller.
2012 shortbed CrewMax 4x4 Toyota Tacoma TV with more antennae on it. 
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06-16-2019, 05:11 PM
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#10
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3 Rivet Member 
2017 25' Flying Cloud
Woodway
, Texas
Join Date: Oct 2017
Posts: 155
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The T&P valve in our 2017 weeped from the start. We resolved it by replacing with one from Home Depot for less than $20 vs the poor-quality, OEM one. rmkrum is correct--even if your water heater could achieve 150+ PSI, the resulting pressure would blow out a PEX seal, pressure regulator or even the braided supply hose before the tank itself could rupture. Happy travels!
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07-06-2019, 09:54 AM
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#11
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Rivet Master
2017 27' Flying Cloud
Greer
, South Carolina
Join Date: Sep 2013
Posts: 511
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Quote:
Originally Posted by emelaich01
The T&P valve in our 2017 weeped from the start. We resolved it by replacing with one from Home Depot for less than $20 vs the poor-quality, OEM one. rmkrum is correct--even if your water heater could achieve 150+ PSI, the resulting pressure would blow out a PEX seal, pressure regulator or even the braided supply hose before the tank itself could rupture. Happy travels!
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Did your Home Depot replacement model have the probe?
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