Water Pressure, what's right?
I'm a bit lost at this point, so I'm hoping to get yet another answer to a question that seems to have no "right" answer. =/
I have a simple hose-bib pressure gauge that matters static pressure. On my house, it reads 92-96psi (not the most precise scale). From what I can find online, thats either "okay" or "high". A page on the lowes site says anything above 80 is bad, and another site say anything below 115psi is okay. I haven't had any appliance failures, and the pipes don't knock since I fixed one of the pipe hangers in the crawl space.
All the pipes in my house are copper, so the risk of bursting is fairly minimal. The house was built in '79. I purchased it in 2007. There is a water tank on the hill behind my house, which probably accounts for the high pressure.
Judging my the reading on the water meter on my house, I'd guess it was replaced 10-20 years ago (hard to tell since I don't know the average water use for the previous owner). But, I don't have an expansion tank on the water heater, and the pressure does not rise above the 92-96, so I'm guessing there is no backflow preventer (when did those become a standard part of pressure reducers?) Likewise, when I purchased the house, the home inspector didn't mention the lack of an expansion tank.
I'm really hoping to get a solid answer here. I'm planning to call the local utility tomorrow and see what they say.
(The Mass. Plumbing code, (found here: http://www.mass.gov/?pageID=ocaterminal&L=6&L0=Home&L1=Licensee&L2=Division+of+Professional+Licensure+Boards&L3=Board+of+State+Examiners+of+Plumbers+and+Gas+Fitters&L4=Statutes+and+Regulations&L5=Rules+and+Regulations+Governing+Plumbers+and+Gas+Fitters&sid=Eoca&b=terminalcontent&f=dpl_boards_pl_cmr_248cmr1000b&csid=Eoca) does say 80 P.S.I.G. )
Thanks very much! I really would rather not spend $500 to install a pressure reducer, but I'd rather do that than have something go wrong. =/