Check the listing for details. 200KBTU Heat Exchanger 1INCH +1 1/2" FPT for Salt Water Swimming Pool Spa SS304. Condition: New, Made in China. Listed at 136.91 USD. Product description: ★The swimming pool heat exchanger is made of high-grade anticorrosive 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 water swimming pools and spas. 1 1/2" FPT is used on one side of the swimming pool water, and 1" 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 200 kBtu/hr. It gets hot immediately without waiting.