(A) General. Piping used in an onsite wastewater treatment system shall be as specified in this section, or equivalent for the intended use as specified in the Illinois Private Sewage Disposal Code, § 905, Appendix A, Illustration C.
(1) Building sewers. Building sewers shall be Schedule 40 PVC or equivalent, and four inches minimum diameter.
(2) Gravity effluent lines. Gravity effluent lines shall be at minimum SDR 35 PVC and four inches minimum diameter.
(3) Pressure supply. Lines With the exception of drip distribution systems, pressure supply lines shall be SDR 21 PVC, and:
(a) Low pressure piping systems. Two- inch minimum diameter on low pressure piping systems.
(b) Drop boxes and distribution boxes. One and one-half inch minimum diameter to distribution boxes.
(4) Low pressure lateral piping. Low pressure pipe lateral distribution piping shall be at minimum SDR 26 PVC, and one and one-half inch minimum diameter.
(5) Gravity lateral piping. Gravity lateral distribution piping shall be corrugated polyethylene ASTM Standard F667-84 or equivalent, and four-inch minimum diameter.
(6) Pipe connectors. Couplings, connectors and fittings shall be appropriate for the size, material, and use.
(a) Pressure lines or low pressure piping. Fittings or other connections in pressure lines or low pressure distribution piping shall be solvent joined schedule 40 PVC pressure fittings.
(Ord. [Bd of Health Ord., Art. V], passed 11-12-1996; Ord. [Bd of Health Ord., Art. V], passed 11-12-2013; Ord. 17-0605, passed 6-13-2017)