Skip to Content
  • 25+ Years Experience
  • American-Made Quality
  • Expert Technical Support
  • Fast Shipping

6687G5S1A

Caleffi TwistFlow™ Radiant Manifold Assembly 7 loop 1 1/4 in.

668S1 TwistFlow™ Assembly Brass Manifold

You get what you pay for in Manifolds 
Caleffi is one of the biggest names in hydronic controls. When you want the best, you want Caleffi.

These manifolds include:

  • Flow meters on each branch - This aids in set up for troubleshooting and allows for heat control on each loop of tubing.

  • A Balancing Valve for each branch of the manifold - This provides maximum control and flexibility.

  • Shut-off Ball Valves - for isolation and control.

  • Supply and Return Temperature Gauges - for system troubleshooting and performance measurement.

  • Air eliminators and purge drain - right on the manifold for easy start-up

  • Top quality Brass construction for proven reliability

  • Mounting Bracket for secure professional look.

  • Sub-Zoneable - With the addition of an actuator on the balancing valve, each loop or any combination of loops can be a separate thermostat controlled zone. 

Factory Direct
838.64 838.64

30-day money back guarantee
  • Manufacturer
  • Max Working Pressure
  • Supply
  • Flow meter scale
  • Outlet center distance
  • Outlets
  • Max Operating Temperature
  • Number of Loops
Terms and Conditions
30-day money-back guarantee
Shipping: 2-3 Business Days
Manufacturer: Caleffi
Max Working Pressure: 150 psi.
Supply: 1 1/4 in.
Flow meter scale: 1/4 to 2 gpm
Outlet center distance: 2 in.
Outlets: 3/4 in.
Number of Loops: 7

Caleffi TwistFlow™ Radiant Manifold Assembly 7 loop 1 1/4 in.