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Old 06-27-2013, 04:50 PM   #1
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Pressure regulator

Did the PO add a new inlet pressure regulator and leave the old one in? Or is the smaller one a check valve? And should there be a hose connected to it?
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Old 06-27-2013, 04:56 PM   #2
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It look pretty new, it still has the tag on it. The one with the hose fitting is a pressure relief valve. The top sticker says its set for 125 psi. That pretty high before it start to do its job. Yes you could put a hose on it incase it ever opens (pressure is greater than 125) or if it starts to leak. I would replace it with a 70 psi relief valve. I'm sure others will chime in.
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Old 06-27-2013, 05:02 PM   #3
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It doesn't look like a regulator, it looks like a safety valve. 125 PSI is WAY too high to be a regulator in an RV plumbing system. Re: the hose: Yeah, if it ever opened, it looks like it would flood the area without some sort of hose attached to direct the water elsewhere.
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Old 06-27-2013, 05:08 PM   #4
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I think the thing in front of it with the black cap and blue tag might be a pressure regulator... ??
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Old 06-27-2013, 05:37 PM   #5
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It is a pressure relief valve and it is still available. Webster is now part of the Watts Company

53 Pressure Relief Valves, Pressure-Only Relief Valves, Water Safety & Flow Control - Watts
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Old 06-27-2013, 06:44 PM   #6
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Thanks,

It does say 125psi "unless stamped otherwise". It is stamped 60.
Is the relief valve necessary? Shouldn't the regulator keep it from to much pressure?
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Old 06-27-2013, 06:46 PM   #7
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All the 70s Airstreams had these 125 psi relief valves. It's not too high, IMHO. It usually opens if you have the pressure up to 45 with your internal pump, then turn on the water heater--dumps a couple of ounces to handle the expansion as the water heats up. If you still have original copper, it can handle the pressure and newer PEX can handle 165 psi.

I think having an accumulator is a better idea. These old relief valves will begin to leak if they open, so it's time to get rid of them (and install an accumulator -- $45).

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Old 06-27-2013, 11:45 PM   #8
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Quote:
Originally Posted by tiger View Post
Thanks,

It does say 125psi "unless stamped otherwise". It is stamped 60.
Is the relief valve necessary? Shouldn't the regulator keep it from to much pressure?
The pressure relief valve is not functioning since it is capped. It probably started leaking so a PO plugged/capped it. Where the plug is now, there would have been a pipe that would have directed water to the exterior when the incoming water service exceeded the pressure set point.

The pressure regulator valve that is inline beyond the relief valve would have reduced the incoming pressure to a lower level if needed.
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