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I'm trying to help out a friend. They bought an older home and in the sinks and shower when the hot and cold are used together the water pressure drops. The pressure coming into the house is 60 PSI and the water main is 3/4 or 5/8 ID the piping going to everything is 3/4 then down to 1/2 inch to the sinks etc. Would changing the piping from the water meter from 3/4 to 1 inch help. Some one suggested we change the pipe to 1 & 1/4 I think this is over kill.
Its a really bad pressure drop. There is no pressure reducing valve in the system. Also 3/4 in and out of the water heater.
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He said older house, but it is all coppered up on the inside only.
Would 3/4" copper "K" still be advised or 1" UG PEX?
trainer for Caleffi NA
The magic is in hydronics, and hydronics is in me
Corporation stop on the main...buried underground.
Curb stop as mentioned above, should rotate a full 1/4 turn from on to off (the ones I know of). A partial closed really cuts things down.
Your water service valve; If a gate type the gate may be not raising all the way. If a globe the washer could be hanging up.
Water meter could have restriction.
Back flow preventer at water meter could have issues.
If any of these are problematic, you could have 60 PSI with no flow, but run some water the PSI falls on its butt.
Did you check the neighbors pressure? If they had that problem it would be a much discussed item for all.
I have found the curb stop problem and it made a world of difference in the house. It is good to exercise curb stops any time they are operated. If the house was winterized the curb stop was probably shut off. Just a fraction of the 90 degree turn can affect the flow. If you looked into one you would understand.
I will get back with what I find.
I always tried to record the location and depth of any curb stops I encountered on the electrical panel door or furnace door of that building. (measured out with tape measure from permanent structure, not 10 paces from tree etc). I have my own curb stop wrench that will fit/reach about 90% of what is around here.
There are a few old water services with unknown stop locations.
The utility also has recorded all stop locations as possible.
Problem solved.