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Main product image of 1" TwistFlow Manifold w/ Temp Gauge (8 Loops)
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1" TwistFlow Manifold w/ Temp Gauge (8 Loops)
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$869.52 each
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Product Highlights

Product Highlight: Supply Size
1"
Product Highlight: Max Pressure (PSI)
150 MAX PSI
Product Highlight: Max Temp (F)
180°F Max Temp

Description

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
Actuators
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.

Specs

Number of Loops:

8

Supply Size:

1"

Max Pressure (PSI):

150

Max Temp (F):

180°F

Media:

Water or Glycol up to 50%

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2 Replacement Parts

Replacement Shut-Off Valve for 668S1 Return Manifolds
SKU: F69590
Caleffi
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Solid construction

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.
Tim the tool man
Boston
11 years ago
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Product Q&A

2 Questions
2 Questions
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Q: Can I use FostaPex PEX-AL-PEX with this manifold? What adapters can I use? If not what brand PEX-AL-PEX can I use with this manifold?

Asked by Ken 9 years ago

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Verified Author and ReplyVerified Reply- SupplyHouse Staff

Fostapex fittings are not available for caleffi manifolds. The more standard brands of pex-al-pex are compatible, such as the Bluefin or Uponor that we carry.

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Q: Can the air vents and supply/return valves be switched around so the manifold can be setup for flow from either side?

Asked by LJ 10 years ago

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Verified Author and ReplyVerified Reply- SupplyHouse Staff

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

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