Ecoflex potable PEX plus is a pre-insulated pipe with a heat trace wire applied on the pipe. This product features a self-regulating heat trace wire with a maximum output of 5W/ft. to keep the water from freezing. The Uponor AquaPEX service pipe in Ecoflex potable plus piping is manufactured by the Engel-method (PEX-a) process and is listed to ASTM F876 and F877. The pipe is surrounded by multi-layer, closed-cell, PEX-foam insulation and a water-resistant, corrugated HDPE jacket, making it ideal for direct-burial applications.Note: Use ProPEX fittings.Codes: UPC, IPC, NSPC, NPC of Canada, National Electrical Code, Canadian Electrical Code Part IManufacturing standards: ASTM F876, ASTM F877, CSA B137.5, ASTM 1960, NSF/ANSI Standard 41, NSF/ANSI Standard 61Product listings: cNSFus-pw, PEX 5106, CSA C22.2 No 130-03 (R2012), ANSI/IEEE 515-2011