McDonnell & Miller SA47-4 Large Bellows Assembly

McDonnell & Miller SA47-4 is a Large Bellows Assembly for the 47 boiler line, and a trusted replacement part designed to restore sealing and performance. Model 341500 includes everything you need: two #37-27 gaskets, the C0-106 cam, and the head gasket #37-26, ensuring a precise fit and reliable operation.

Designed for long service life, this kit offers essential replacement parts to maintain boiler efficiency in 47-series systems. The large bellows assembly is built to endure routine boiler cycles and deliver dependable sealing under pressure, making it a core component for 47 boiler maintenance and repair.

• Compatibility: McDonnell & Miller SA47-4 and 47-series boilers
• Includes: 2 x #37-27 gaskets, C0-106 cam, head gasket #37-26
• Durable construction: designed for long service life and repeat use
• Easy installation: ready-to-install replacement parts to minimize downtime
• Performance: supports reliable sealing and boiler efficiency