Polypropylene sewage fittings of the Standard series are intended use in regular housing sewage systems with the regular drainage temperature under 80°С and short-term (under 1 min) periods under 95°С. They can be used for chemically aggressive drainage with pH levels between 2 (acidic) and 12 (alkaline). Polypropylene fittings are produced by pressure casting from Polypropylene homopolymer (type 1) PP-H. Spigot-socket joint. Double-lipped sealing made of styrene-butadiene rubber with plastic spacing ring.