BIG BOSS pipe adaptors offer a quick and easy way to fit a pipe boss. Great for retrofit applications where limited access prevents using a strap on boss adaptor. Fits onto 110mm uPVC Pipe
44mm hole size required for 1½" (40 mm) pipe
38 mm hole size required for 11⁄4" (32 mm) pipe
25mm hole size required for 21.5mm Overflow pipe