Hot Water Recirculating Pumps: What They Do and Need
A hot water recirculating pump is designed to keep hot water moving through your home’s plumbing so it’s available at the faucet or shower with less wait time. Instead of letting hot water sit in the pipes until you turn on the tap, the system circulates it continuously (or on a schedule), returning cooled water to the water heater to be reheated.
While the idea is simple, deciding whether you need one depends on several practical factors—especially your pipe layout, your typical usage patterns, and your tolerance for energy costs.
How a recirculating pump works
In most homes, hot water leaves the water heater, travels through the hot-water line to the fixture, and then cools in the pipes when you’re not using it. A recirculating pump moves water through that loop so the hot line stays warm. Many systems also include controls such as timers, temperature sensors, or occupancy-based trigge ... Read more »

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