The ThermoDrain™ TDX series is the next evolution in Drain Water Heat Recovery (DWHR). Its robust stainless steel construction and refined compact design maintain high thermal efficiency while simplifying installation. As warm wastewater flows down the drain stack it heats the central copper drain tube; incoming cold water captures that heat and preheats the supply feeding your water heater and/or shower — recovering energy that would otherwise be lost down the drain.
Installed vertically in the 3″ main drain stack during rough-in and integrated using ABS solvent cement. Preheated water can feed the water heater cold inlet, the shower cold side, or both for the maximum-efficiency new-construction configuration.
Built for building professionals
Direct from manufacturer
Expert installation guidance
Tested and documented