The Rodetal BB2/BL BigBoss boss pipe adaptor is designed to fit 110mm uPVC pipes and connect a 32mm pipe boss. This boss adaptor provides a quick and easy solution for fitting a pipe boss, making it ideal for retrofit applications where access limitations prevent the use of strap-on boss adaptors. A 38mm hole is required for the 32mm (1 1/4") pipe. Installation involves solvent weld cementing. Installation Guide: 1. Drill the correct sized hole using a hole saw. Chamfer the outer edge of the hole for easier insertion of the fitting. 2. Clean the surface around the hole. Apply suitable adhesive around the hole and the inner face of the fitting. 3. Insert the fitting with a little force, ensuring the correct flow direction. 4. Connect the appropriate pipe once fitted.