Glossary

Term	Description
ABS	Acronitile Butadene Styrene (a type of plastic used for waste systems, but should not be installed externally).
Anti-syphon	A type of waste trap, which is designed to prevent self syphonage (where the water seal is sucked out of the trap). Normally, this occurs due to the waste falling vertically before at an even gradient to the stack, thus creating a vacuum.
Appliances	Examples include a WC, sink, basin & bath, as well as a washing machine or dishwasher.
Compression	A screw type method of jointing. The fitting has a screw cap and a ring seal, which, when tightened, makes a watertight seal.
MuPVC	Modified Polyvinyl Chloride (able to withstand higher temperatures, generally used for waste systems)
Polypropylene	A type of plastic, used in the manufacture of push-fit waste systems.
Push fit	A method of jointing, where the fitting has a ring seal to make it watertight
PVCu	Polyvinyl Chloride (unplastised)
Solvent weld	using a solvent to adhere two surfaces (used with PVCu or ABS)
Waste Trap	A fitting required where waste water is discharged to drain. The trap creates a water seal, preventing any odours from the drain to pervade the house.