Pre-insulated Uponor AquaPEX® (ASHRAE 90.1-2013) features flexible PEX pipe
encased in polyethylene-foam insulation to insulate potable-water lines and meet
ASHRAE 90.1-2013 energy-code requirements. The product is approved for use in hot
and cold domestic potable water systems, residential fire safety and hydronic heating
and cooling systems containing no ferrous corrodible components or where ferrous
components are isolated from the piping. The product is also approved for direct burial
in soil provided it is not exposed to groundwater. Uponor recommends adding 1/2" of
insulation to accommodate for foam compression in direct-burial applications.