Calder Style Coupling
Calder Style Coupling: Superior Performance for Underground Pipe Systems
The Original Calder Style Coupling represents the industry standard for high-performance pipe connections, featuring a special thick rubber center stop that ensures perfect alignment while enhancing overall system integrity. Available in sizes from 3" to 8" with optional removable filler rings, these couplings create reliable transitions between virtually any pipe materials—clay, plastic, cast iron, ductile iron, asbestos cement, and more—making them the professional's choice for gravity flow infrastructure.
These versatile connectors deliver exceptional performance in demanding underground environments, exceeding rigorous ASTM standards while withstanding 4.3 psi hydrostatic pressure under deflection conditions. The integrated center stop technology transforms a simple coupling into an engineered connection point, establishing ideal compression zones on both sides that prevent infiltration/exfiltration while distributing movement forces along the elastomeric gasket rather than concentrating at pipe ends. With premium 300/316 series stainless steel bands and hardware paired with high-durometer elastomer rubber, these couplings provide durable, corrosion-resistant performance throughout the system's lifecycle.
Features
- Integrated Center Stop: Special thick rubber center stop molded directly into the coupling body.
- Universal Compatibility: Connects clay, plastic, cast iron, ductile iron, asbestos cement, or any other pipe type.
- Regional Adaptability: Works with both Western Style and Eastern Style Clay Pipe.
- Size Range: Available in 3" to 8" sizes to accommodate various application needs.
- Removable Filler Rings: Optional inserts for transitioning between different pipe diameters.
- Premium Hardware Options: Worm gear and nut & bolt tightening devices in 300 and 316 series stainless steel.
- Bushing Compatibility: Accepts Calder Style Bushings for specialized transitions.
- Precision Engineering: Carefully molded center stop ensures accurate pipe alignment.
- Vibration Control: Elastomeric design dampens vibration transfer through the connection.
Engineered for underground excellence. Proven in the field.
Universal Material Compatibility: Seamlessly joins dissimilar materials (clay, PVC, cast iron, ductile iron, asbestos cement, HDPE) without specialized fittings.
Precise Alignment Control: Eliminates installation guesswork with positive stop while preventing pipe end damage.
Enhanced Deflection Management: Functions as deflection fulcrum during ground settlement while maintaining proper pipe spacing.
Hydraulic Seal Optimization: Creates redundant sealing surfaces that prevent infiltration/exfiltration with separate pressure boundaries.
Superior Performance Standards: Exceeds ASTM requirements while maintaining seal integrity during differential settlement.
Corrosion Resistance: Premium stainless steel components with elastomer rubber maintain integrity in aggressive environments.
Efficient Installation: Requires minimal excavation with single-tool tightening process and visually verifiable proper installation.
Total Cost Reduction: Eliminates specialized transition fitting inventory while reducing system downtime and extending infrastructure lifecycle.
Vibration Dampening: Protects connected pipe segments through elastomeric isolation design.
Additional Resources
Sizing Tables
Calder Style Coupling with Center Stop
