1" TwistFlow Manifold (4 Outlets) Zoom

1" TwistFlow Manifold (4 Outlets)


Brand: Caleffi

Qty Price
/ each
$627.90 / box (2 units x $313.95)
In Stock! Ships in 24-48 Hours
(11 Available)



Number of Outlets: 4
Supply Size: 1"
Max Pressure (PSI): 150
Max Temp (F): 180°F
Media: Water or Glycol up to 50%

Description for Caleffi 6686D5S1A

Series 668S1 TwistFlow pre-assembled distribution manifold for radiant panel systems with built-in sight flow gauge/balancing valve

Distribution manifolds for radiant panel systems are used to optimally distribute the heating fluid in floor heating system circuits and ultimately improve the control of heat emission from the panels. The manifolds ensure that the flow to each circuit is regulated precisely and also control the shut-off, venting and automatic removal of air from the system.

  • 1" NPT inlet ball valves
  • Maximum working pressure: 150 psi (10.3 bar)
  • Maximum temperature: 180°F (82°C)
  • Maximum peak temperature: 200°F (93°C)
  • Loop Cv: 1.23 (combined supply & return ports)
  • Outlet center distance: 2 inches

This manifold requires (6) Loop Fitting Assemblies:

PEX Loop Fitting Assemblies Options
PEX-AL-PEX Loop Fitting Assemblies Options
Optional Installation Accessories:

Loop End Cap
If you want to use your manifold to heat multiple zones, you can purchase return side actuators that work along side thermostats. The actuators act as zone valves to allow you to use one manifold to control the temperature in different rooms independently.
Note: Image may not be actual representation of item.

1" TwistFlow Manifold (4 Outlets)


by PowerReviews
Caleffi1" TwistFlow Manifold (4 Outlets)

(based on 1 review)

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(1 of 1 customers found this review helpful)


Just what I had expected


from Muncie, IN

Verified Buyer



      Best Uses

        Comments about 1" TwistFlow Manifold (4 Outlets):

        Replaced existing manifold with Caleffi, was totally satisfied with ease of installation as well as operation.

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        • No

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