The Sanitaire Dirt Tube & Overmold Assembly part number 77491 is an OEM conversion component that converts a Sanitaire F&G bag set up to use the ST bags. This assembly weighs 0.50 lbs and transforms older commercial uprights to accept the more efficient ST bag system instead of traditional F&G bags.

The dirt tube assembly features durable construction with an integrated overmold design that ensures secure connection and proper sealing. Available in black finish, this genuine Sanitaire component maintains the commercial-grade reliability required for heavy-duty cleaning applications.

Compatible vacuum cleaner models include SC889A, SC888K, SC888J-1, SC888J, SC883A-1, SC883A, SC688A-1, SC688A, SC678A-1, SC678A, S677D, S670D among others. This conversion fits Sanitaire Tradition Series models that accept a style ST disposable bag, allowing users to upgrade from the older F&G bag system to the more convenient ST bag format.

Swiss Boy Vacuum in Bountiful has specialized in vacuum parts and service since 1963. As Utah's most trusted vacuum specialists, we stock genuine Sanitaire components including this dirt tube conversion assembly to keep your commercial cleaning equipment running at peak performance.