Keep your pellet stove's combustion system sealed and efficient. This OEM-specification silicone hub gasket seats between the combustion blower motor and the firebox housing, preventing combustion air and exhaust gases from bypassing the blower -- a common cause of poor draft, smoke spillage, and nuisance shutdowns on QuadraFire pellet stoves.
The 812-4710 gasket is a direct OEM-replacement silicone ring that seals the combustion blower motor hub to the blower housing on a wide range of QuadraFire pellet stove models. Silicone holds up to the heat cycles and combustion gases that degrade standard rubber or cork gaskets over time.
If your stove is producing error codes related to combustion airflow, struggling to maintain temperature, or showing signs of exhaust odor near the blower assembly, a deteriorated or missing hub gasket is a likely culprit. Replacement takes only basic hand tools and is a standard part of annual pellet stove servicing.
High-temp silicone resists heat cycles and combustion gases better than rubber or cork alternatives.
Machined to 6 inches in diameter and 3/16" thick for accurate fit against the blower motor hub flange.
Compatible with 10+ QuadraFire pellet stove models including Castile, Santa Fe, Classic Bay 1200, and more.
Manufactured domestically to OEM specification. Also cross-referenced as NBK Parts 20476.
On a pellet stove, the combustion blower draws outside air in and expels exhaust gases out. The hub gasket seals the interface between the motor shaft hub and the blower housing. If this seal fails or degrades, combustion air can short-circuit -- reducing firebox pressure, causing incomplete combustion, and potentially allowing exhaust gases to leak into the stove cavity or living space.
Replacing this gasket during any blower motor service or annual cleaning is low-cost insurance against airflow problems. Because the gasket is thin and seated under the motor, visual inspection alone is not always enough -- if your stove is more than two to three seasons old and has never had the gasket replaced, consider doing so proactively.
A properly seated 812-4710 gasket restores the blower's designed static pressure and airflow, helping your QuadraFire run at rated efficiency and pass auger/ignition timing checks.
This gasket is sold under QuadraFire part number 812-4710 and is also cataloged as NBK Parts number 20476. Both numbers refer to the same component -- either can be used to verify fitment with your stove's service manual or parts list.