SpaShopper offers the Tecmark 4000 Series 25 Amp Pressure Switch 3029P featuring a durable plastic base paired with a stainless steel top. Equipped with 1/8" MPT standard threading for direct installation into your heater assembly, plus dual spade terminals for simple two-wire hookup. This field-adjustable component allows pressure calibration ranging from 1-5 psi to suit your specific system requirements.

Compatible replacement for various SPNO pressure switches rated between 1-25 amps across multiple brands including Barksdale, Balboa, Gecko, ACC, Hydroquip, Len Gordon, Maddux, CTI, Challenger, United, and other standard hot tub heater manifolds. Ideal for older air-driven or mechanical 115V plug-in configurations where the heating element's hot wire routes through the switching mechanism.

Common failure symptoms include the switch failing to close when circulation pump activates and creates system pressure, or not opening when the pump cycles off. These malfunctions typically result in no-heat conditions or overheating scenarios, triggering error codes like FLO, FL, FLC, OH, HL among others on most control systems. Prior to switch replacement, verify your circulation pump operates properly, filters are clean, water level is adequate, and all spa jets remain fully open.