The 33" Water-to-Water Heat Exchanger is a stainless steel water-to-water, domestic water heat exchanger with 3/4" FIP end and side ports. Install on existing water heater for thermal circulating heat transfer. Fittings Kit (p/n 2053) or Push-fit Fittings Kit (9263) are available separately for easy installation.
(The 5600018 Heat Exchanger replaces part number 591)
