1/2" 300ft O2 Barrier HeatLink® Pipe-in-Pipe Red Sheath | HeatLink
Riifo BPX120 1" x 20' Oxygen Barrier PEX-B TubIng Straight Length Pipe In Red | AF Supply
Qual-Pex Barrier Pipe
Supply Giant APR12500 PEX A Tubing for Potable Water Non-Barrier Pipe 1/2 in.... | eBay
The Plumber's Choice 1/2 in. x 1000 ft. Red Polyethylene Tubing PEX A Non-Barrier Pipe and Tubing for Potable Water A-PFW-R121000 - The Home Depot
PEX Pipe 3/4" 300ft Coil Non-Oxygen Barrier - Blue Pex Tubing for Radi
Happybuy PEX Tubing Oxygen Barrier - 2 Rolls of 1/2 Inch X 300 Feet Tube Coil - EVOH PEX-B Pipe for Residential Commercial Radiant Floor Heating Pex Pipe (1/2" O2-Barrier, 2x300Ft/Red+Blue): Amazon.com:
BENTISM Oxygen O2 Barrier PEX Tubing - 1/2 inch X 300 FT Pex Tube Coil - EVOH PEX-B Pipe for Residential Commercial Radiant Floor Heating Pex Pipe - Walmart.com
SharkBite 3/8-in (1/2-in O.D) x 500-ft Orange PEX-C Pipe With Oxygen-Barrier For Rant Heating in the PEX Pipe, Fittings & Specialty Tools department at Lowes.com