The Retro-DWS (https://heatline.com/retro-dws) self-regulating heating cable system for sewer pipes is the perfect solution for frozen sewer lines. This heating cable system is designed to be installed inside non-pressurized 3-inch and larger septic, sewer or drain pipes. The Retro-DWS pipe heating cable system is generally installed in sewer pipes located between the building and the septic tank or city sewer. Retro-DWS systems are delivered complete with industry certified plumbing components and Heat-Line’s advance self-regulating electrical heat tracing technology factory installed inside a high density polyethylene pipe with a proprietary fusion end seal. Supplied job-ready to internally heat trace common 3 inch and 4 inch septic and sewage pipe applications, the Retro-DWS can also be easily adapted to fit larger pipes with readily available plumbing components. The Retro-DWS is a fully serviceable product that can be used to prevent frozen drain pipes or as a precautionary system to energize only if a freeze up occurs.

For pressurized applications or sewer pump lines please see the the Retro-FM (https://heatline.com/retro-fm)