14 CAR § 20-114. Pipe and specialty connectors and fittings standard

(a) PVC pipe, tubing, reducer tees, adapters, elbows, couplers, and compression fittings shall be constructed of Schedule 40 PVC. (b) Lock-Slip fittings, adapters, tees, elbows, and couplings shall be specifically manufactured for use with wastewater drip dispersal systems. (c) Insert fittings, barbed adapters, tees, elbows, and couplings shall be specifically manufactured and sized for use with wastewater drip dispersal systems.