Check the listing for details. TecMark 4037P, 16A, 1/8"MNPT, SPST Pressure Switch Replacement for Spa Heaters. Condition: New. Listed at 19.94 USD. Upgrade your spa heater with our premium Wholesale Sensors Pressure Switch Replacement designed specifically for TecMark 4037P models. This high-quality pressure switch ensures reliable performance, safeguarding your spa equipment and providing a seamless heating experience. Crafted with precision, this replacement switch features a 16A capacity, 1/8" MNPT connection, and operates on the Single Pole Single Throw (SPST) configuration. 12-Month Warranty by Wholesale Sensors, a USA Manufacturer: Rest easy knowing your purchase is protected by our 12-month warranty. Wholesale Sensors, a trusted USA manufacturer, takes full responsibility for ensuring the quality and performance of our product, offering you added peace of mind with every purchase. Replacement for TecMark 4037P, 16A, 1/8"MNPT, SPST for Spa Heaters. This replacement switch is compatible with a wide variety of pool and spa heaters, offering versatility and convenience. Built with durability in mind, this switch features a sturdy construction with brass thread that can withstand the demanding conditions of spa environments. The 1/8" MNPT connection ensures a secure and leak-free fit, maintaining the integrity of your spa heating system.