Nylon has good resistance to organic solvents, oils and gasoline. Good strength at high temperatures. Cold and hot-water applications. Longtime weathering resistance. Good impact resistance, both single and repeated. Not recommended for use with ammonium, boric acid, calcium, sulfuric acid, or hydrochloric acid. F.D.A. listed. Also N.S.F. listed. Polypropylene has good chemical resistance. Withstands continuous temperatures up to 215°F. Opaque. Unaffected by most weak acids and alkalies. Below 175°F it has good resistance to organic solvents. Do not use with oxidants or strong acids or in continuous sunlight. N.S.F. listed. 20% glass filled for improved stiffness. Tube X FPT is pictured.