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How to Install a Radiant Heat System Underneath Flooring (page 3 of 4)

Don't freeze those tootsies: Keep any room warm and comfy with radiant floor heat.

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Step 13: Cut the PEX Pipe

Leaving extra pipe, cut the PEX so you can feed it back through the wall.

Use a mallet to ensure the PEX hasn't popped out of the track.

Tip: Run air or water through the system to check for leaks before installing the finished floor.

Step 14: Connect Radiant Block to the Supply

The radiant mixing block ties into the water heater. The feed and return from the radiant block will go into two ports and is connected to the supply, which comes from the water heater.

Step 15: Attach Adaptor to Heat Loop Port

Remove the control panel and the cover. Use a threaded male adaptor coated with Teflon paste, and screw into the radiant heat loop port on the pump.

screw threaded male adaptor into radiant heat

Step 16: Connect PEX and Threaded Adaptors

Add Teflon paste to the threaded 3/8-inch PEX adaptor, and connect to the threaded male adaptor.