We are closed for vacation through 4/02/23.

Orders and email requests will be held until we resume normal operations on Monday, April 3, 2023. We apologize for any inconvenience.

We are a small family business, and after four years and COVID we need a vacation!

Directory: Catalog > Radiant Heating > Watts Radiant Pipe, Fittings, Manifolds, Etc.

Watts Radiant RadiantPEX-AL Tubing
(PEX-AL-PEX Pipe)

RadiantPEX-AL is a composite pipe engineered for radiant floor heating. We call it ALEX Pipe. It's proven, long lasting and maintenance-free. Installers like it because it's lightweight, durable and can be shaped to fit any jobsite. The aluminum layer protects boiler systems against corrosion and it has superior temperature and pressure ratings.

ALEX Pipe is manufactured to American Standard Testing Methods for composite radiant pipe and fittings (ASTM F-1281). Included are requirements and test methods for materials, workmanship, dimensions, environmental stress cracking, sustained hydrostatic pressure strength, thermo-cycling resistance and bend strength among other tests. RadiantPEX-AL meets or exceeds these specifications.

• Best of Both Worlds - Strength, memory and pressure rating of aluminum with the corrosion resistance of PEX, inside and out.
• Bends To Your Will - Rigid enough to hold itself in place for straight, neat runs with enough flexibility to go around obsticales without additional fittings.
• The Strong Silent Type - Doesn't expand as much as PEX, resulting in less noise in an underfloor application.
• Your Guardian Angel - 100% oxygen barrier.
• Download Literature: Loading times will vary depending on the speed of your Internet connection. After the download is complete, use your browser's back arrow to return to this page.
• Watts Radiant Heating - Full Catalog (7.4 MB Adobe PDF)
• RadiantPEX-AL Brochure (600 KB Adobe PDF)
• RadiantPEX-AL Compression Fittings Brochure (425 KB Adobe PDF)
• Watts Pipe Installation Manual (4.6 MB Adobe PDF)

Due to supply issues, please Contact Us for pricing and lead time.

Please Note: We are closed for vacation through 4/02/23.

Orders and email requests will be held until we resume normal operations on Monday, April 3, 2023. We are a small family business, and after four years with no vacation we promise that we will be back on April 3 to go another four years with no vacation!