Cause of in-house low pressure
Posted by Chuck McNeil on December 04, 1998 at 20:45:59:
Hello, I am having a problem with low pressure(and volume)on all supply outlets in my home. The house was built in the mid 40's and all galvanized pipe. I have looked for a reducing valve on all lines in the home and found none. The static pressure at closest and furthest outlet to the incoming line from the street are 145psi with a residual of 10psi with one outlet open (irregardless of outlet proximity. I have cleaned all strainers and have had the utility company check the meter and street side of the line. They have advised me that sometimes the reducing valves on older homes in the area were buried just on the house side after the meter and that the reducing valve is clogged or jambed and is chocking the normal flow pressure. I find it hard to believe that it could still have a static of 145psi at the house outlets if a reducing valve is actually on the incoming line. There is a standard shutoff (like on an external spicket)that is buried and could be faulty. Where should I start looking for the problem and what is the lowest acceptable flow pressure for a residence?

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