Uneven Water pressure

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Uneven Water pressure
Author: mrnelsonb (VA) I live in a rural area with a well. When taking a shower the pressure will be very weak for 8 - 10 min but then increase. This doesn't happen when I run water in the shower sink for a few min and then turn on the shower. Could there be air in the lines? This house is 26 yrs old.
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Re: Uneven Water pressure
Author: North Carolina Plumber (NC) It's not air. Its sounds as if there's a large expansion tank and it takes a little while to draw it down enough for the pump to kick back on.
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Re: Uneven Water pressure

Author: KCRoto (MO)

NC is correct, but if you wanted to change out the switch and increase the expansion tank pressure accordingly it would improve the shower pressure. The only other thing that might help is to shut down the system, drain it out, and check the pressure in the tank. Increase it to 5 psi under the high limit of the pressure switch. Most of the flow would be at that pressure until it drops under for a short time before the pump kicks back on.

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Re: Uneven Water pressure

Author: hj (AZ)

Quote; Increase it to 5 psi under the high limit of the pressure switch.

Do you want to rephrase your advice? Doing that would give good pressure for a couple of minutes until the "little bit of water" in the tank was depleted and then there would be NO WATER for a few seconds until the residual pressure dropped to the pump's turn on point and the pump started to give water flow again.

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Re: Uneven Water pressure
Author: Paul48 (CT) Is your pressure switch mounted on a galvanized nipple?
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Re: Uneven Water pressure
Author: KCRoto (MO) That's why I suggested changing the pressure switch first.
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Thanks for all the posts.
Author: mrnelsonb (VA) It seems that I should try replacing the pressure switch first to see if this fixes the problem. THanks for all the posts. Edited 1 times.
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