Home>Discussions>PLUMBING>Water & Expansion Tank Pressures
3 posts / 0 new
Last post
Water & Expansion Tank Pressures

What is the suggested water pressure in a house with all spigots off? My gauge reads 58-65 psi. Should I screw down the pressure reducing valve some? What should I air up a new expansion tank bladder to before installing it? Should the psi in the bladder be a little more or less or right at the average static psi?

Re: Water & Expansion Tank Pressures

Generally speaking you want the pressure to be below 80 lbs.
A bladder tank should be precharged to 2 lbs less than the on pressure of the pump switch.

Re: Water & Expansion Tank Pressures

Thx Jim. I am on city water rather than a well. The expansion tank bladder refered to is the tank used to compensate for the increased system presure due to hot water expansion. The system is closed in that it has a check valve in the line from the city. Any change on your thoughts?

Sponsored Stories

TV Listings

Find TV listings for This Old House and Ask This Old House in your area.