Monument Automatic & manual 15mm Pipe cutter. The Monument autocut® for plastic pipe cutter AC4P is a plastic pipe cutter which has been designed & manufactured in Britain. The Monument autocut® for plastic is designed as a single sized plastic pipe cutter & ranges from 10mm plumbing pipe up to 2in waste pipe. The waste pipe versions will cut both push-fit as well as solvent weld waste pipe. The sheffield stainless steel blade is replaceable & interchangeable throughout the entire range.