Quote:
Originally Posted by ldj1938
Installing a hot water recirculation pump. You put the crossover under the sink furthest from the hot water tank. It pumps constantly through the hot from the tank and returns through the cold water lines. When you draw cold water, you get cold water. When you draw hot water you get HOT water. No waiting. Mine runs constantly.. It a small pump that uses very little electricity and I don't think it's worth trying to set the times it should run. Live a little...let it run. Be happy, don't waste water, recirculate. It sooo worth the small expense to have hot water when you want it. 
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When my pump runs I get hot water from both the hot and cold pipes. Reason is the hot water is returned to the hot water tank through the cold water pipe. Guess you have a separate return pipe?