Pressure relief on Jockey pump

[SPKR]

I am having a bit of discussion with my co workers about installing a 1/2" pressure relief valve on the jockey pump discharge piping.
The Jockey pump churn plus the static pressure from the city water supply equals 125 psi. I see no reason for one.
Others say we need it and it must be adjustable. I really don't understand the adjustable part. It just needs to be set for 175 psi.

Any insight would be appreciated,
Thanks

 

[mk3223]

IMO, the PSV is needed if the maximum operating pressure is possibly exceed the system design pressure, i.e. 175 psig as mentioned. If the discharge pressure of the jacket pump is not to over it, the PSV may not be needed. And, you may confirm it with the Local AHJ for the final decision.

 

[LittleInch]

If your jockey pump is a centrifugal pump then I agree. You also need to account for any temperature changes. Water pressure can rise by a surprising amount per degree F.

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