4S319B | Wavin OsmaSoil Strap Boss (Black) 110mm

A reliable boss adaptor designed to connect 110mm OsmaSoil ring-seal sockets to side branch outlets post-construction. This compact, lightweight PVCU boss features a captive rubber seal and keyway for proper fall alignment. Ideal for retrofitting connections to appliances (e.g., cisterns) without drilling into the main stack. The strap design enables secure installation and leak-free performance

• Compact retrofit solution: connects 110mm branches after main stack installation.
• Leak-proof joint: captive seal prevents gasket displacement.
• Proper pitch retention: keyway ensures correct fall on vertical stacks.
• Secure strap mounting: quick and easy installation.
• Certified resilience: Kitemarked and BS/ISO-compliant for professional quality.