What Is a Hot Water Circulating Pump?

A hot water circulating pump is a little electric pump attached to or near your water heater. Its job is to keep hot water moving through the pipes so that when you turn on a faucet, you get hot water almost immediately.

Why People Use Hot Water Circulating Pumps

Here are what the pumps do:

• Send instant hot water to sinks or showers that are far from the hot water tank.
• Save water since you’re not waiting for the water to warm up.
• Lead to more comfort and convenience in everyday use (showers, washing hands, doing dishes).

Smart Features

Not every pump is the same. Some models include extra features that make them more efficient and easier to use. If you’re unsure of your pump make and model, let us know. We can identify that for you during the inspection.

Timers: You can set the pump to run during high-use times (like in the morning or evening, for example) instead of 24/7.

Thermostat controls: The pump senses temperature; if pipes are already hot, it shuts off. When the water cools down, it kicks back on. This can save energy and wear.

Taking Care of Your Pump

There’s a few simple checks you can do on the hot water circulating pump to help it last longer and run better. If any of these steps identify problems, consider calling a plumber.

• Test to see if water coming from faucets located far from the pump warms up, or if the water stays cold.
• Touch the pump body; if it’s extremely hot, turn it off and discontinue use until it’s inspected.
• Listen for any rattling, grinding or screeching noises. You want the pump to give off a gentle hum or vibration. If you hear noises, turn off the pump.
• Look for small drips, moisture, or rust spots around the pump and pipes, scanning for leaks or corrosion.
• Double-check any timers and change thermostat settings based on your needs; replace batteries if the pump uses them.
• Flush the heater once a year (Sediment builds up in tanks, and flushing it helps reduce strain).

Warranty & Getting Help

Pump manufacturers often offer warranties, but they only apply if everything was installed correctly and no modifications were made. If you install the pump, hang on to the receipt.

Even if you don’t have warranty or installation information, contact a licensed plumber if you have questions about your pump. These professionals can help teach you how to use the pump and fix any problems you see.

If you need a plumber, check out my list of Trusted Partners.