Collection: Recirculating Pump Sales

What's the difference between bronze and cast iron circulator pumps?

Bronze and lead-free bronze pumps are built for potable water, which is why they show up on domestic hot water recirculation lines. Cast iron costs less and holds up fine in a closed heating loop, where the water never touches the domestic supply.

How do I know what size circulator pump I need?

Match GPM (gallons per minute) and horsepower to what the loop actually demands, factoring in pipe length, zone count, and resistance from fittings or elbows. For a straight replacement on an unmodified system, matching the existing pump's specs is a reasonable place to start. Multi-speed pumps add flexibility for multi-zone systems, letting an installer dial in flow after the fact instead of committing to one fixed rate.

What are the signs a circulator pump is failing?

A radiator that used to warm up and doesn't anymore, or a hot water tap that takes noticeably longer to run hot, are common early signs. Unusual humming, visible corrosion around the housing, and a system that runs constantly without maintaining temperature are also worth investigating.

Can I replace a circulator pump myself?

A wet-rotor pump on a simple loop with sweat or union connections is within reach for many homeowners with some plumbing experience. Once flanged connections, zoning valves, or a more involved hydronic setup are involved, it's worth bringing in a licensed pro, both for code compliance and because a heating system mistake is far more disruptive to fix than a simple leak.

What's the difference between residential and commercial-grade circulator pumps?

Residential pumps are built for the intermittent cycling of a typical home heating loop. Heavier-duty and commercial models use an oil-lubricated, three-piece design built to run continuously without the wear a residential pump would see, which matters most in larger homes or light commercial applications.

When is the Plumbing Deals Labor Day 2026 Sale?

September 1 through September 15, 2026. Bell & Gossett, Taco, and Grundfos circulator pumps are part of the sale for the full window, residential through commercial-grade.