Double O-ring OEM Modules

See how it works


  • Simple installation using Flo-Link Double O-Ring Fittings that eliminate the possibility of leaks from leak prone tapered pipe threads
  • Front flush ports
  • Foam insulated cabinet stops condensation
  • High Impact Polystyrene Cabinet will not rust
  • Fully assembled and leak tested
  • Utilizes industry standard Grundfos circulators (one and two pump modules available)*
  • NEW! Variable Speed Flow Center
  • Available with either die cast brass or composite valves*
* Double O-ring OEM Modules and Fittings are available only through your OEM Ground Source Heat Pump Manufacturer. Please contact your OEM supplier for pump and valve options.
performance curves

composite valve flow center

NEW! Variable Speed Flow Center


Valve Flow Center


brass valve flow center
Brass Valve Flow Center
See larger graph  

Variable Speed Pumps: