Product description:? The pool heat exchanger is made of high-grade anti-corrosion stainless steel, which has the characteristics of anti-rust and salt water resistance, so it is very durable and very suitable for chlorine or salt pools and spas. 2 inch FPT is used for swimming pool water, and 1 inch FPT is used for hot water. The salt pond heat exchanger adopts an innovative in-line design to ensure a continuous constant temperature and indirectly transfer heat between any hot water circuit, steam circuit and any swimming pool or spa facility. The shell-and-tube heat exchanger is based on the 60°C (140°F) temperature difference between the inlet and hot water, and can provide a fresh pond of 400 kBtu/hr. It gets hot immediately without waiting.