1" TwistFlow Manifold w/ Temp Gauge (8 Outlets) Zoom

1" TwistFlow Manifold w/ Temp Gauge (8 Outlets)


Brand: Caleffi

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Number of Outlets: 8
Supply Size: 1"
Max Pressure (PSI): 150
Max Temp (F): 180°F
Media: Water or Glycol up to 50%

Description for Caleffi 6686H5S1A

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

Note: This manifold requires 16 Loop Fitting Assemblies (please see below).

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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 (16) 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.

1" TwistFlow Manifold w/ Temp Gauge (8 Outlets)


by PowerReviews
Caleffi1" TwistFlow Manifold w/ Temp Gauge (8 Outlets)

(based on 1 review)

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Reviewed by 1 customer

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Solid construction

By Tim the tool man

from Boston

Verified Buyer

Comments about 1" TwistFlow Manifold w/ Temp Gauge (8 Outlets):

Nice solid piece. Well machined and finish is bright. The flow meters and adjusting valves are easy to adjust for flow. Air vents work great and having drain valves are a plus.

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1 Question | 1 Answer
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  • 1" TwistFlow Manifold w/ Temp Gauge (8 Outlets)


    Can the air vents and supply/return valves be switched around so the manifold can be setup for flow from either side?
    Asked on 1/3/2016 by LJ from Michigan

    1 answer



      Yes, they can be reversed in their brackets to swap the direction of the inlet/outlet.

      Answered on 3/8/2016 by SupplyHouse Staff from NY
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