PP branch 87 degrees SN8 with three sockets

  Datasheet (PDF)

The PP branch 87 degrees SN8 (SDR 34) with three sockets provides reliable flow division and directional convergence for buried gravity sewerage systems and underground drainage networks. Engineered for utility infrastructure and municipal drainage lines subjected to surface vehicular traffic, this polypropylene fitting connects three spigot pipe ends using factory-fitted elastomeric sealing rings. Featuring a certified ring stiffness rating of SN8 (8 kN/m²), the component resists heavy earth backfill loads and dynamic ground pressures across demanding civil engineering projects.

Technical specifications

This triple-socket branch is manufactured from high-grade polypropylene compound to withstand mechanical impact, ground movements, and aggressive chemical exposure from municipal wastewater. The three profiled push-fit sockets allow direct connection of chamfered spigot pipe ends without requiring supplemental double couplers or external sleeves.

• Material: Polypropylene (PP) with high chemical and thermal stability
• Ring stiffness: SN8 (8 kN/m²), conforming to SDR 34 standard dimension ratio
• Angular deviation: 87 degrees for efficient hydraulic branch connection
• Joint design: Three push-fit sockets equipped with factory-retained EPDM gaskets
• Chemical resistance: Inert to domestic effluents, industrial detergents, and media from pH 2 to 12
• Thermal operational limits: Continuous drainage up to 60 degrees Celsius, with short-term peaks up to 95 degrees Celsius

Applications

This fitting is designated for non-pressure underground gravity sewer collectors and civil storm drainage installations laid outside the building envelope. It serves municipal, industrial, commercial, and roadway projects where discharge lines are buried beneath areas exposed to medium and heavy surface vehicular traffic.

Common installation layouts include municipal foul sewer mains, combined drainage networks, industrial effluent routing, and surface water runoff systems. The robust SN8 structural rating reliably supports buried trench depths between 0.8 meters and 6.0 meters when embedded in accordance with civil engineering compaction and bedding standards.

Installation and jointing

Jointing is performed through push-fit mechanical insertion into each of the three integrated sockets, utilizing pre-installed synthetic EPDM rubber gaskets conforming to EN 681-1. The elastomeric seals provide hydraulic tightness under both internal hydrostatic head and external groundwater infiltration, while allowing longitudinal expansion and minor angular compensation.

Spigot ends must be cut perpendicular to the pipe axis, deburred, and chamfered at an angle of approximately 15 degrees before assembly. An approved silicone-based pipe lubricant must be applied evenly to the spigot bevel and gasket surface prior to pushing the spigots home. Mechanical alterations or trimming of the branch sockets are strictly prohibited to preserve structural integrity.