1.1 This specification covers chlorinated poly(vinyl chloride) (CPVC) pipe made in Schedule 40 and 80 sizes and pressure-rated for water (see appendix). Included are criteria for classifying CPVC plastic pipe materials and CPVC plastic This specification covers chlorinated poly(vinyl chloride) (CPVC) pipes made in Schedule 40 and 80 sizes and pressure-rated for water. These pipes are intended for use with the distribution of pressurized liquids only, which are chemically compatible w