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soul4sail · Feb 13, 2006, 02:12 AM

Hi, I have a question about installation of a booster pump to a city water supply that has 38 to 40psi. The manufacture of grundfos and davey pumps require a Pressure regulator to be installed not to excide 30 psi.Do most cities require or have any codes to support this?and inspect it? I live in a condo complex with 32 davey pumps one in each unit. All the pumps were installed about 3 years ago and we have had 14 pressure tanks burst. I found out that the never installed a pressure valve on the city water line. Can this cause the tank failures. I know that my gauge was pegged to 100 plus psi at times. Thanks, Steve please email me at [email protected]

speedball1 · Feb 13, 2006, 06:27 AM

Hey Steve,
The average house pressure runs about 45 PSI. This is why city water towers are 100 feet tall.
"The manufacture of grundfos and davey pumps require a Pressure regulator to be installed not to excide 30 "
I'm confused, If you pump has a pressure regulator that chokes you down to 30 PSI how in the world did your system work up to 100 PSI?
Don't your pumps have pump control boxes,(see image) that shut the pump down when a certain pressure's reached? If you don't have a pump control then somebody made a huge mistake. If you have no contreol over the pumps pressure then install a control box at once. Get a Square"D" 30/50 box. This would kick the pump on if the pressure fell below 30 PSI and shut it off when the pressure reached 50 PSI. What am I missing here? A pump control is a basic part of any pump installation why don't your building have them?
I got to be missing something. Nobody's stupid enough to install a entire building with booster pumps that can blow up a pressure tank.
Are they?? Tom