PPR pipes and fittings

Polypropylene is the most common material for indoor water and heating pipework. Pipes and fittings are joined by heat welding: the parts are heated and pushed together, fusing into one piece with no threads or seals.

Standard pipe suits cold water; use reinforced pipe for hot water and heating. How to weld a joint that does not leak or narrow the bore is shown in “Welding polypropylene pipe”.