PP branch 87° SN three sockets

  Datasheet (PDF)

PP branch 87° SN8 (SDR 34) with three sockets provides reliable flow division and line convergence for buried gravity sewerage systems. Designed for underground wastewater networks requiring high structural integrity, this injected PVC-KG fitting connects three spigot pipe ends using pre-fitted elastomeric sealing rings. With a ring stiffness rating of SN8 (8 kN/m²), it resists heavy soil and surface traffic loadings across civil engineering and municipal drainage applications.

Technical specifications

The three-socket PP branch is engineered from rigid unplasticized polyvinyl chloride to withstand external earth loads and chemical attack from aggressive effluents. The triple socket configuration allows direct insertion of chamfered spigot ends without requiring additional repair couplers or sleeves.

• Ring stiffness: SN8 (8 kN/m²), corresponding to standard dimension ratio SDR 34
• Joint configuration: Three sockets with factory-fitted EPDM elastomeric sealing gaskets
• Chemical resistance: Inert to domestic wastewater, caustics, and acidic solutions with pH values from 2 to 12
• Operating temperature limit: Continuous drainage up to 40 degrees Celsius, with short-term peaks up to 60 degrees Celsius
• Hydraulic performance: Low inner roughness preventing sediment accumulation and encrustation

Applications

This fitting is intended for non-pressure underground gravity sewer and drainage networks installed outside building footprints. It serves municipal, industrial, and residential projects where pipelines are laid beneath roadways subjected to medium or heavy traffic loads.

Common installations include foul water drainage collectors, meteoric water pipelines, surface water runoff channels, and industrial water transport. The SN8 structural rating supports buried trench depths between 0.8 m and 6.0 m in accordance with standard civil engineering design criteria.

Installation and jointing

Jointing is performed by push-fit insertion into the three integrated sockets, each fitted with synthetic rubber gaskets conforming to EN 681-1. The elastomeric seal accommodates minor angular deflections and reversible pipe movements while maintaining full system tightness.

Trench installation must be executed in compliance with SR EN 1610 guidelines for buried gravity pipelines. Connecting pipe spigot ends should be cleanly cut, chamfered, and coated with suitable pipe lubricant prior to assembly. Care must be taken during handling on site to avoid impact damage, particularly when ambient temperatures drop below -5 degrees Celsius.