Recirculating Pumps
Recirculating pumps bring hot water to fixtures faster and keep hydronic loops moving efficiently. Shop potable-water circulators for domestic hot water (DHW), cast-iron pumps for heating, under-sink “comfort” kits for homes without a return line, and smart ECM models that learn usage and save energy.
Shop by need
- DHW bronze/stainless circulators: potable-rated pumps for dedicated return lines
- Under-sink retrofit kits: pump + crossover/comfort valve for homes without a return line (uses the cold line as a temporary return)
- Hydronic heating circulators: cast-iron wet-rotor pumps for radiant/baseboard/boiler loops
- High-efficiency ECM: variable-speed/auto-adapt models that cut power draw and reduce noise
- Controls & accessories: timers, temperature sensors/aquastats, check/isolation valves, unions/flanges, replacement cartridges
-
Grundfos - 519651 - 3/4" 15/16 Bronze Flange Set
GrundfosOriginal price $ 49.12 - Original price $ 49.12Original price$ 49.12$ 49.12 - $ 49.12Current price $ 49.12| /Grundfos 519651 — 3/4″ Bronze Flange Set The Grundfos 519651 is a robust bronze flange kit compatible with UP and UPS circulator pumps. This set in...
View full detailsOriginal price $ 49.12 - Original price $ 49.12Original price$ 49.12$ 49.12 - $ 49.12Current price $ 49.12| / -
Grundfos 529912 — 3/4″ Bronze Union Threaded End Pair for UP/UPS Pumps
GrundfosOriginal price $ 40.99 - Original price $ 40.99Original price$ 40.99$ 40.99 - $ 40.99Current price $ 40.99| /Grundfos 529912 — 3/4″ Bronze Union Threaded End Pair The Grundfos 529912 fits GU-125 union pumps (UP/UPS family), providing a reliable connection ...
View full detailsOriginal price $ 40.99 - Original price $ 40.99Original price$ 40.99$ 40.99 - $ 40.99Current price $ 40.99| / -
Grundfos 519601 — 3/4″ Cast Iron GF15/26 Flange Set for UP/UPS Circulators
GrundfosOriginal price $ 20.92 - Original price $ 20.92Original price$ 20.92$ 20.92 - $ 20.92Current price $ 20.92| /Grundfos 519601 — 3/4″ GF15/26 Cast Iron Flange Set The Grundfos 519601 is a durable cast-iron flange set designed for use with the GF15/26 connect...
View full detailsOriginal price $ 20.92 - Original price $ 20.92Original price$ 20.92$ 20.92 - $ 20.92Current price $ 20.92| /
Pro tips: Add a spring-check to stop ghost flow, use isolation flanges for easy swap-outs, and set timers to match routines. For crossover kits, place the valve at the farthest fixture and insulate lines. Flush debris from old loops and clean strainers after start-up. Questions? Tell us pipe size, loop length, and heater/boiler details—we’ll dial in the pump and controls.