Pentair 72082 Immersion Well 3.5 Inches Pool Heater

Product Description

The PENTAIR 72082 is a replacement immersion well designed for use with Pentair pool and spa heaters. An immersion well is a sealed tube or socket that allows a temperature sensor or thermostat probe to be inserted into the water or fluid stream without direct contact with the water. This enables accurate temperature measurement within the heater system while keeping the sensing element protected and removable. The 72082 measures 3.5 inches in length and is built to match OEM fit and function for straightforward replacement service.

This immersion well is intended for pool and spa heating systems where the original well has corroded, cracked, or otherwise failed. It is installed within the heater body at the water inlet or outlet port, depending on the specific heater configuration. Pool and spa service technicians performing heater diagnostics or sensor replacements will typically encounter this component when troubleshooting inaccurate temperature readings or sensor failures. It is suited for residential pool heater applications.

Key Features

• OEM-style replacement immersion well for Pentair pool and spa heaters
• 3.5-inch length for correct probe depth and fitment
• Sealed design isolates temperature sensor from direct water contact
• Allows sensor removal and replacement without draining the system
• Direct replacement for simplified servicing

Compatibility

Designed as an OEM-style replacement immersion well for Pentair pool and spa heaters requiring a 3.5-inch immersion well.

Installation Notes

Installation should be performed by a qualified pool and spa service technician. Before servicing, shut off power to the heater at the breaker and allow the system to cool to a safe handling temperature. Ensure water flow to the heater is isolated before removing the existing well to prevent water discharge. Verify thread type and size before installation to confirm a leak-free seal, and use appropriate thread sealant as required by local codes.