Re: Does 90 psi require a pressure reducing valve?
Posted by jimbo on May 26, 2004 at 21:13:11:
In response to Re: Does 90 psi require a pressure reducing valve?
Sylvan has given you some facts and fugures. I can tell you from personal experience that at 90PSI you can expect erratic operation of the toilet fill valve. Rubber washing machine supply hoses are in jeopardy. As Sylvan mentioned, devices such as washing machine, dishwasher, even a push-pull type shower or kitchen faucet.. the rapid turn off can result in water hammer which is annoying and possibly damaging.

Apparently this condition has existed for some time?? and nothing has blown up yet; we are just giving some recommendations here.

I usually set the PRV at 60-65 on a one story structure and about 70+ for a 2 story. This seems to be satisfactory for most folks. A more conservative setting would be 50-55, but some folks find this does not work a shower head to their liking.

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