Insulated Underground Line - Outdoor Wood Boiler Tubing

We sell three types of underground line

3 Wrap: Our most economical option. Two 1" pex lines, a red and a blue, surrounded by three wraps of foil backed bubble wrap insulation inside a 4" tile-like corrugated line.

5 Wrap: Our most popular option. Two 1" pex lines, a red and a blue, surrounded by five wraps of foil backed bubble wrap insulation inside a 5" tile-like corrugated line. 

Solid Core Foam Line: Our most economical insulated line. This line consists of a 4.5" poly line containing two 1" pex lines surrounded by solid core, water proof closed cell foam. 

If you need a length not listed below, please call us so we can assist you with an exact cut length.

Three Wrap Insulated Line for Outdoor Wood Furnaces