When a repair calls for precision rather than guesswork, this MasterTemp and Max-E-Therm Stack Flue Sensor Service Kit is made to fit the listed Pentair and Sta-Rite application. It is is a direct replacement service part for the compatible pool or spa equipment named in the title.It helps restore fit, function, and dependable operation when the original part is worn, damaged, missing, or no longer performing as intended. For best results, confirm model series, BTU rating where applicable, fuel type where applicable, and part number 42002-0024S against the existing equipment. Built for the listed Pentair application. Useful for targeted repair instead of full equipment replacement. Verify part number and fit before ordering. Proper fitment and installation help protect the surrounding equipment and support long-term service reliability.