Skip to content
Enjoy fast and free shipping on all orders over $89! Contact us (855) 424-4376
Enjoy fast and free shipping on all orders over $89! Contact us (855) 424-4376

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

    Grundfos
    Original price $ 49.12 - Original price $ 49.12
    Original price
    $ 49.12
    $ 49.12 - $ 49.12
    Current 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 details
    Original price $ 49.12 - Original price $ 49.12
    Original price
    $ 49.12
    $ 49.12 - $ 49.12
    Current price $ 49.12
  • Grundfos 529912 — 3/4″ Bronze Union Threaded End Pair for UP/UPS Pumps

    Grundfos
    Original price $ 40.99 - Original price $ 40.99
    Original price
    $ 40.99
    $ 40.99 - $ 40.99
    Current 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 details
    Original price $ 40.99 - Original price $ 40.99
    Original price
    $ 40.99
    $ 40.99 - $ 40.99
    Current price $ 40.99
  • Grundfos 519601 — 3/4″ Cast Iron GF15/26 Flange Set for UP/UPS Circulators

    Grundfos
    Original price $ 20.92 - Original price $ 20.92
    Original price
    $ 20.92
    $ 20.92 - $ 20.92
    Current 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 details
    Original price $ 20.92 - Original price $ 20.92
    Original price
    $ 20.92
    $ 20.92 - $ 20.92
    Current 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.

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare