Raypak Heater Bulb Sensor Well | 007211F

The Raypak 007211F is an OEM stainless steel bulb sensor well — also known as a thermowell — designed to protect the temperature sensing bulb within the heat exchanger on a wide range of Raypak pool and spa heater models. The sensor well acts as a protective sleeve between the temperature sensor and the pool water flowing through the heat exchanger, shielding the sensor from direct water contact and pressure while still allowing accurate temperature measurement for precise heater operation. The 007211F measures 3-3/8 inches in length with a 15/32-inch inside diameter and a flared 9/16-inch outside diameter at the open end, and the single-piece stainless steel construction is engineered for corrosion resistance and long-term thermal durability in demanding pool heater environments. The thermowell is compatible with Raypak heater models 53, 53A, 53B, 55A, 151, 153, 153A, 155A, 181, 183A, 261, 263A, 331, 333A, 401, and 403A, and it was formerly listed under Raypak part number 350336.

Highlights

• OEM Stainless Steel Thermowell: Factory-authorized 007211F sensor well manufactured from a single piece of stainless steel to exact Raypak specifications, providing precise dimensional fit and dependable corrosion resistance across the service life of every compatible Raypak pool and spa heater model in the lineup.
• Sensor Bulb Isolation from Pool Water: The thermowell forms a protective barrier between the temperature sensing bulb and the pool or spa water flowing through the heat exchanger, shielding the sensor from water pressure and chemical exposure while still transmitting accurate temperature readings to the heater's control system for proper operation.
• Factory-Matched Dimensions: Measures 3-3/8 inches in length with a 15/32-inch inside diameter and a flared 9/16-inch outside diameter at the open end, matching Raypak's original factory specifications exactly so the 007211F seats securely and seals properly within the heat exchanger during installation.
• Wide Raypak Heater Coverage: Fits an extensive range of Raypak pool and spa heater models spanning the full legacy lineup, including models 53, 53A, 53B, 55A, 151, 153, 155A, 181, 183A, 261, 263A, 331, 333A, 401, and 403A, making the 007211F one of the most versatile thermowell replacements in Raypak's broader parts catalog.
• Replaces Legacy Part Number 350336: The 007211F is the current Raypak OEM part number that supersedes the older 350336 designation, so customers searching by either part number can confirm this is the correct replacement thermowell for their compatible heater model without confusion.

Compatibility

Compatible with most Raypak heaters, please refer to your owners manual to confirm compatibility