Subsoil drains shall be open-jointed, horizontally split or perforated pipe conforming to one of the standards listed in Table P3302.1. Such drains shall be not less than 4 inches (102 mm) in diameter. Where the building is subject to backwater, the subsoil drain shall be protected by an accessibly located backwater valve. Subsoil drains shall discharge to a trapped area drain, sump, dry well or approved location above ground. The subsoil sump shall not be required to have either a gas-tight cover or a vent. The sump and pumping system shall comply with Section P3303.
|Asbestos-cement pipe||ASTM C 508|
|Cast-iron pipe||ASTM A 74; ASTM A 888; CISPI 301|
|Polyethylene (PE) plastic pipe||ASTM F 405; CSA B182.1; CSA B182.6; CSA B182.8|
|Polyvinyl chloride (PVC)||ASTM D 2729; ASTM F 891; CSA B182.2; CSA B182.4|
|Stainless steel drainage systems, Type 316L||ASME A112.3.1|
|Vitrified clay pipe||ASTM C 4; ASTM C 700|