Dwelling Under-Slab Drainage Inspection Checklist
by Riley Farrell, from the Community
This dwelling under-slab drainage inspection checklist helps builders, plumbers, and council inspectors verify critical plumbing and drainage requirements before a concrete pour. Record DA and LG numbers, confirm main and branch venting, branch line length, traps and floor wastes, gullies, correct pipe fall, direct rodding access to toilets, 7–10 mm stone backfill around pipes, 100 mm fixture penetrations, and pressure testing. Capture notices of work, attendance, comments, and final outcomes to ensure compliance and a quality build.
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