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Water volume from the shower.


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I just installed a shower kit this fall and it seems to have poor water volume. I do get some water and it is hot but the cold mixer valve doesn't seem to have much effect. When I bought the boat it had a heater installed with the "Y" pipe on the pressure side of the raw water pump. So when I installed the shower, I moved the heaters "Y" pipe to the suction side and installed the cold water supply "T" where the "Y" had been. I then "T"ed into the heater supply hose from the top of the head for the hot water supply. The heater works a hundred percent better. Is there a better way to plumb the shower to get more cold water volume or is this typical?

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Seems like a dumb question but is your boat running when you do the cold water test. I made this mistake for a year thinking I could run my shower without the engine running. You get great hot water pressure and volume but no cold. Eventially the water gets too hot to use. I realize now that of course the engine needs to be pulling in new cold water to balance the tempurature and volume. Just thought I would share my experience.

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