Subsoil drains shall be open-jointed, horizontally split or perforated pipe conforming to one of the standards indicated 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.
|Cast-iron pipe||ASTM A74; ASTM A888; CISPI 301|
|Polyethylene (PE) plastic pipe||ASTM F405; CSA B182.1; CSA B182.6; CSA B182.8|
|Polyvinyl chloride (PVC) plastic pipe (type sewer pipe, SDR 35, PS25, PS50 or PS100)||ASTM D2729; ASTM D3034; ASTM F891; CSA B182.2; CSA B182.4|
|Stainless steel drainage systems, Type 316L||ASME A112.3.1|
|Vitrified clay pipe||ASTM C4; ASTM C700|