The Dresser Style 91 Service Saddle for cast iron pipe delivers reliable branch connections on cast iron water mains and distribution pipe — the backbone of virtually every legacy water distribution system in North America. Cast iron pipe presents unique dimensional challenges compared to steel: bell-and-spigot joints, varying wall thicknesses, and legacy OD standards that don't align with modern ductile iron or PVC sizing. The Style 91 for cast iron is dimensioned to fit these legacy OD ranges accurately, ensuring a full-contact seal between the saddle gasket and the pipe surface for a leak-free tapping connection.

Key Features

• Dimensioned specifically for cast iron pipe ODs — not ductile iron or steel
• Full-circle gasket conforms to cast iron pipe surface for a positive seal
• Strap-secured body provides stable platform for tapping under pressure
• Available in a range of nominal pipe sizes covering legacy cast iron main sizes
• Accepts standard corporation stop (CC) and NPT thread outlets
• Suitable for live-tap tapping operations without main shutdown
• Ductile iron body standard

Materials of Construction

Size availability, OD ranges, part numbers, and pressure ratings available on request. Contact us to confirm the correct configuration for your pipe material, OD, and application.

This configuration is specifically dimensioned for cast iron pipe OD ranges. For steel pipe, see Style 91 — Service Saddle for Steel Pipe. Cast iron pipe ODs differ from ductile iron of the same nominal size — confirm your pipe OD before ordering.