On Dec 9, 9:56*am, wrote:
On Tue, 09 Dec 2008 08:56:38 -0500, George
wrote:

You didn't mention what the application is but 40/60 PSI is a good
working pressure for a home. You get good performance and the various
valves etc don't get destroyed nearly as quickly as they would at higher
pressures.

The only problem with that is plumbing fixtures are rated at 80 PSI.
Your "3 GPM" shower will just dribble when that tank is coming down to
40 to trip the switch.

Hmmm... I'm not sure what you mean about dribbling. I completely
bypassed my booster pump and pressure tank (set for about 45/60) and
put a tank on my hill. I get around 40 psi and that's just fine and
dandy. Washer fills up quickly, plenty of pressure for showers and
hosing off cars, impulse sprinklers work just fine... No more of that
sudden increase in pressure when the booster kicks in.... For that
matter I was using a 55 gallon drum halfway up the hill for a while
and was only getting about 21 psi and that was enough for a decent
shower.