Pentair 473605z Water Pressure Switch Minimax Nt Std

Product Description

The PENTAIR 473605z is a replacement water pressure switch designed for Pentair pool and spa heater systems. The switch monitors water flow by detecting pressure inside the heater, and it signals the control board to allow or interrupt burner operation based on whether adequate flow is present. This is a direct OEM-style replacement part installed by licensed pool and spa service technicians during routine heater maintenance or when diagnosing flow-related fault codes. Proper water pressure switch function is essential to preventing dry-fire conditions and protecting heat exchanger components.

The 473605z is used in residential and light-commercial pool and spa heating applications. It fits Pentair MiniMax CH and MiniMax NT series heaters across a range of BTU capacities, including models controlled by the 6800 and DDTC controller platforms. Typical installation occurs when the existing switch fails to close under normal flow conditions, triggering a flow fault or preventing ignition. This part is also replaced as part of a broader heater pressure-side diagnostic service.

Key Features

• Detects water pressure to confirm adequate flow before allowing heater ignition
• Protects heat exchanger from dry-fire damage caused by low or no flow conditions
• Direct replacement for OEM switch in MiniMax CH and MiniMax NT STD, NT LN, and NT TSI heater lines
• Compatible with both 6800 and DDTC controller models
• Covers MiniMax NT capacity models 200, 250, 300, and 400

Compatibility

Fits Pentair MiniMax CH pool and spa heater models 150 IID, 200, 250, 300, 350, and 400. Also fits Pentair MiniMax NT STD, NT LN, and NT TSI pool and spa heaters with 6800 and DDTC controller models 200, 250, 300, and 400. Also listed for use with the ThermalFlo Titanium Heat Pump series at the 200 through 400 size range.

Installation Notes

Installation should be performed by a qualified pool and spa service technician familiar with gas or heat pump heater systems. Shut off power to the heater at the disconnect and close the system isolation valves before removing the pressure switch to avoid water discharge. Inspect the port and fitting threads for debris or corrosion before installing the new switch. Follow local codes and the heater manufacturer service manual for torque and wiring reconnection procedures.

Technical Specifications

• Function: Water pressure detection for flow confirmation

Standard Information

• Brand: PENTAIR
• Manufacturer Part Number: 473605z