Explore our comprehensive selection of replacement parts for the Pentair ETi 400 Heater, designed to maintain your pool or spa's optimal heating performance. Our inventory includes essential components such as fan control boards, membrane pads, air pressure switches, wire harnesses, thermal fuses, stack flue sensors, and condensate neutralizer kits, ensuring compatibility and reliability. These parts are suitable for both residential and commercial applications, providing durable solutions for your maintenance needs. Shop now to take advantage of competitive prices and fast shipping, keeping your heating system running smoothly.