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Section P3302 Subsoil Drains

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P3302.1 Subsoil Drains
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 gastight cover or a vent. The sump and pumping system shall comply with Section P3303.
TABLE P3302.1
SUBSOIL DRAIN PIPE
MATERIAL STANDARD
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

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