To be installed on existing domestic water heater for thermal circulating heat transfer.
Side ports and end ports are 3/4" FIP.
5600018 Water-to-Water Heat Exchanger, 33"
2053 Fittings Kit
Fittings Kit can be sold separately. eBay item number: 142354594973
Side Arm exchanger can be sold separately, eBay item number: 143069666291