Pressure Relief Valve Check For Old RV Water Heater


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Old 09-17-13, 04:39 AM
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Pressure Relief Valve Check For Old RV Water Heater

How do you check the high pressure relief valve to see if its still working?

I have a RV Suburban SW10PE LP Gas/Electric water heater and will be hooking up the 120 V Single Pole 1440 Watt electric side today at the sub panel box: the line had been disconnected at some point. I put in a new electric coil.

Gas side is losing pilot flame and control/temp valve will not activate main gas: there are 10 and 16mv at the white wires past the thermocouple. I think the gas control valve is dead but there is circuit continuity through it. We are low on propane gas right now.

Just wanted to make sure that pressure relief valve works for insurance. Maybe it is best to replace the valve. Thanks!
 
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Old 09-17-13, 07:58 AM
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There really is no way to check it but you can pull the release handle to make sure it opens and lets out water.
 
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Old 09-17-13, 08:16 AM
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Water did come out when pulling release, so I may stay with it. The water heater is ten years old.

Not sure why electrical was disconnected and will find out today! Thanks!
 
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Old 09-17-13, 09:14 AM
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After the Pressure Valve water flow check, the valve is dripping water for last hour so I may get a new valve as to electrical below.
 
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Old 09-17-13, 10:49 AM
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Not sure why electrical was disconnected and will find out today! Thanks!
Yes install new relief valve..

Not sure why electrical was disconnected and will find out today
Most likely in an RV the element burns out because the owners fail to bleed out the air and turn on the electric...
 
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Old 09-17-13, 11:52 AM
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Suburban RV manufacturers just advised me on the air pocket and that makes sense. Opening the anode, I was powered sprayed with silicone-like jelly which turns out to be IRB (iron related bacteria), which the tank had a lot of - this day is going good! The valve dripping slowed. I was going to hold off, but might as well change so the tank does not blow with the new element. Thanks!
 
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Old 09-18-13, 09:50 AM
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Locally, a 10473 Camco pressure relief valve is available which would replace the Suburban 161157: the only difference I see (same 3/4, Z21.22, 150psi, 210 degree shutoff) is the BTU rating.

Suburban's relief valve is rated 100000 BTU and Camco is 500000. Should these figures match for replacement?

Camco's tech line could only say they replace Suburban, so waiting on this one.
 
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Old 09-18-13, 09:59 AM
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The BTU rating is how fast it could dump the water out in a emergency and sized to the BTU of the boiler/heater...

Usually that rating is important for large commercial boilers and such...

Larger # is better... As long as the other specs match your good to go.
 
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Old 09-18-13, 02:09 PM
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That is good to know. Today, at an RV store, I saw the exact same Camco valve rated at 100000 instead of 500000 - probably an older version. I will go with this valve and thanks!
 
 

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