The Dresser Style 4 Collar Leak Clamp is a full-circle band clamp engineered to stop leaks at caulked collar joints on cast iron bell-and-spigot pipe. When lead-and-oakum caulked joints begin to leak — whether from corrosion, ground movement, or aging — the Style 4 provides a fast, dependable repair without excavating or replacing the joint. The clamp encircles the pipe at the collar, with a resilient rubber gasket that conforms to the bell contour and seals against the pipe surface for a durable, pressure-tight connection.

Key Features

• Full-circle design seals the entire circumference of the collar joint
• Resilient rubber gasket conforms to bell contour for a positive, leak-free seal
• Center-closing bolt configuration for uniform gasket compression
• Compatible with lead-and-oakum caulked cast iron bell-and-spigot joints
• Installs over existing joint — no pipe replacement or cutting required
• Designed for buried water distribution and wastewater service
• Available in a range of nominal pipe sizes

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.

Designed for cast iron bell-and-spigot joints with caulked (lead-and-oakum) collars. Not intended for use as a structural repair on cracked or split pipe bodies — see Style 80 or Style 110 for wall defect repairs.