Pentair METAL FLUE COLLAR 4″x8″ (77707-0077)

The Metal Flue Collar is an adapter part that’s used to connect a negative-pressure metal gas vent to the heater. Fits most vent sizes on MasterTemp Heaters: 200, 250, 300, and 400 as well asPentair Sta-Rite Max-E-Therm pool and spa heaters. Includes a 4-inch by the 8-inch collar. Also includes one tube of Loctite SI 596 RD red high temp RTV Silicone Adhesive Sealant.