Engineered for 240V operation

Constructed with a Monel bellows for superior corrosion resistance and high-temperature durability

For the technician

By addressing valve stem leakage proactively with genuine Belimo replacement parts

where the hottest water accumulates

Williams 9303 Extension 340155-7024 Engineered for 240V operationThe Williams 9303 Extension is a professional grade 24 inch vent extension kit engineered specifically for direct vent gravity wall furnaces. This heavy duty galvanized steel vent extension is the standard solution for HVAC installers dealing with deep wall penetrations where standard venting falls short. It is designed for use with wall thicknesses ranging from 15 inches to 24 inches, ensuring a secure and code compliant flue path from the furnace to