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Originally Posted by ohioshooter
We have built 4 homes before. Two had basements with water tank heaters with recirculating hot water. Please explain how to recirculate hot water with a on demand heater and plumbing below the concrete floor. Thanks
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A check valve (cross over valve) is installed under the master bath sink. A timer is on the recirculating pump can be set in 15 min increments.
Amazon.comThe hot water travels thru hot line loops thru to the cold and returns back on cold one to tankless heater. When shower or sink faucet is operated the check valve prevents back flow of cold water to hot water pipe.