Question about Moen & One Handle Tub & Shower Faucet

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Low water flow in Shower

Bought replacement cartridge for Moen posi-temp shower valve and installed as per the directions. Upon testing the unit, there is very little flow with hardly any water pressure.
With cartridge out, water pressure significant to reach the back end of the tub.
Is it possible that I could have put the metal cylinder in 180 degrees backwards? It doesn't look like it but then again.

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  • Dominic
    Dominic May 11, 2010

    It is a possible the shower cartridge was put in upside-down or even backwards; do you have a diverter? Have you checked the shower closet for debris? Sometimes excess solder can clog the mixing valve or the water supplies.

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  • 102 Answers

Definitely try reversing the cartridge.

Posted on Mar 11, 2009

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