ThermoPEX is flexible pre-insulated piping consisting of two waterproof oxygen barrier PEX lines (supply and return) protected by polyurethane closed cell foam insulation and a thick, durable, waterproof polyethylene outer jacket. It is the ideal insulated piping for use with outdoor furnaces. The outside diameter of 1" ThermoPEX is 4-3/8".
 
This item cannot be shipped to a residence or commercial property. This item must either be picked up at ECC Outdoors or a location authorized by ECC Outdoors.