Series 668S1 TwistFlow pre-assembled distribution manifold for radiant panel systems
with built-in sight flow gauge/balancing valve
Note: This manifold requires 8 Loop Fitting Assemblies (please see below).
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 (8) Loop Fitting Assemblies:
680505A: 3/4" PEX Loop Fitting Assembly This fitting will connect 3/4" PEX to a loop of the Manifold without requiring the use of a PEX Tool.
PEX-AL-PEX Loop Fitting Assemblies Options
682550A: 3/4" PEX-AL-PEX Loop Fitting Assembly This fitting will connect 3/4" PEX-AL-PEX to a loop of the Manifold without requiring the use of a PEX Tool.
Optional Installation Accessories:
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.
Nice when you need inverted manifolds, but not without flaws
These inverted manifolds are nice when your pex is running up, and will save you from running a loop to the bottom of the manifold. However, the clearance to the mounting brackets with 1/2 pex is basically touching. Also beware the flow gauges on the bottom will allow the even the slightest amount of sediment to drop into them.
Brad
Pennsylvania
7 years ago
Verified Buyer
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