I got 105 PSI inside pressure but low flow from shower head pipe?

by Daniel
(Corona)

Hello,

My home water pressures, which I measured with an old and a brand new water pressure gauges, at an outside water house faucet which connects to a PCV pipe, two faucets which connect to pipe that goes into the house, and my up-stair outlet pipe which connects to my shower head is consistently at about 105 PSI. I have learned that this is quite high inside pressure but the only problem I am experiencing now is low water flow and pressure coming out from my up-stair shower head; even after I put in a new one. I observed that the outside faucets has quite strong flow. I have two questions: 1) Is the 105 PSI inside pressure something I should concern? and 2) Why do I get low flow from my shower head pipe (I wonder if my shower head pipe is somehow clogged up or it has a flow restrictor somewhere). Any responses or pointers is appreciated.

Hi Daniel,

How old is the house? High pressure and low flow are typically results of steel pipes rusting from the inside out and reducing flow. Is there a flash of red color when you first turn on the water? If so, you have identified the problem. If not, there is a blockage of some kind that is restricting the water flow. 105 psi is very high. I know it feels good when taking a shower, but it is very hard on the faucets. They are designed for 50 to 75 psi. Washers and seals wear out quicker requiring frequent replacement to stop the dripping.


Dave