PP double branch 87°

  Datasheet (PDF)

The PP double branch HTDA is an injection-moulded polypropylene fitting designed for connecting two opposing secondary waste lines into a vertical soil stack or horizontal drainage run. Engineered for building drainage and ventilation systems, the fitting features precision push-fit sockets equipped with factory-fitted EPDM lip seals that withstand continuous operating temperatures up to 60 degrees and intermittent discharges up to 95 degrees.

Technical specifications

The PP double branch HTDA facilitates balanced dual branch junctions in gravity soil and waste installations while maintaining reliable hydraulic capacity. Its smooth internal walls prevent deposit buildup and optimize flow dynamics in high-temperature wastewater networks.

• Operating temperature: 60 degrees continuous service, resisting short-term discharges up to 95 degrees and cold conditions down to -15 degrees.
• Chemical resistance: broad resistance across media from pH 2 to pH 12, including detergent discharges and domestic chemical effluents.
• Hydraulic roughness: Manning coefficient of 0.01 for minimal frictional resistance and encrustation prevention.
• Impact resistance: compliant with SR EN 744 testing, displaying zero percent breakage under standard impact.
• Expected service life: minimum 50 years under standard internal sanitary operating conditions.

Materials and standards

Manufactured from unplasticized polypropylene compounds, this fitting exhibits high mechanical strength, dimensional stability, and resistance to aggressive chemical agents. All components are certified in accordance with SR EN 1451-1 and factory specification SF98/2017.

The raw polypropylene material provides a density of 0.95 g/cm3, a tensile strength of 15 N/mm2, and a linear thermal expansion coefficient of 0.12 mm/(m·K). Factory-installed EPDM synthetic rubber gaskets provide permanent joint sealing within the profiled sockets, accommodating pipe flexure and building movements without loss of tightness.

Installation and jointing

Jointing is performed manually through a push-fit socket configuration, completely eliminating the need for adhesives or hot welding methods. The socket geometry and integrated elastomeric ring deliver rapid assembly and permit necessary axial movement caused by thermal expansion.

Installers must apply a dedicated piping lubricant to the spigot end and the seal face before insertion. Shortening or cutting the fitting bodies is strictly prohibited, as modifying factory spigot dimensions compromises the structural integrity and sealing performance. When embedding within masonry or concrete, sockets must be shielded with protective wrapping to prevent mortar ingress, and pipe openings must remain sealed during construction.