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For questions relating to the water system of a home or other building, including plumbing and fixtures, water heating, water filtering and treatment, and irrigation/sprinkler systems. Questions regarding swimming pools and spas should have the additional tags "pool" or "spa".
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Will insulating pipes shorten the time it takes for hot water to reach the faucet?
Insulating the pipes will of course make the water in the pipes cool down slower, but once it's too cool for your shower (or whatever), you'll still have to wait the same time for hot water to arrive from … To eliminate the wait, you can add a second pipe back to the tank (connecting to the cold water intake pipe, or thereabouts) and a circulator pump. The pump could be small. …