This is a stainless steel thermowell used on Raypak millivolt heaters with capron headers. This stainless steel well houses the capilary tube from the temperature sensor (003346F). This part includes a stainless tube with a brass threaded end which threads into the capron header.
For use with: For Heat Exchanger, Fits Model 206A, 266A, 336A, 406A Digital Atmospheric, 207A, 267A, 337A, 407A Digital Low NOx Millivolt Pool Heater
Dimension: 15/32 Inch Inside Diameter x 9/16 Inch Outside Diameter x 3-3/8 Inch Length