The 110mm Push-Fit Soil 87.5° Double Socket Branch (Black, Ref: SPB0010) is a heavy-duty uPVC soil and vent fitting designed to connect a secondary 110mm branch line into a main vertical 110mm soil stack. Engineered at an 87.5° angle (often designated as 92.5°), it provides the necessary continuous fall of 2.5° to ensure efficient, self-cleansing gravity drainage while preventing backflow into connecting sanitary appliances.
 
Unlike a triple socket fitting, this double socket variant features rubber ring seal sockets on the main horizontal branch entry and the upper vertical socket, while incorporating a plain spigot end at the bottom. This layout allows the spigot to insert directly into the socket of the underlying pipe or fitting, making it ideal for compact, continuous vertical stack runs. Integrated closed side bosses also allow for direct connections from smaller 32mm, 40mm, or 50mm waste lines using standard boss adaptors.
 
Manufactured from durable, high-impact, UV-stabilized uPVC in compliance with UK standards (BS EN 1329-1), the black finish is well-suited for external soil and vent stacks exposed to sunlight as well as high-visibility internal installations. The push-fit connection mechanism enables fast, dry assembly and accommodates natural thermal movement along the soil pipe system without requiring solvent cement.