PlumbingCivil
Stormwater Drainage Inspection & Test Plan
ITP for stormwater drainage systems covering roof drainage, downpipes, pits, subsurface drainage, OSD systems and connection to authority infrastructure per AS/NZS 3500.3.
12 checklist items
3 hold points
1 witness points
Checklist Preview
Roof Drainage
Requires sign-offP/F
Gutter sizing per hydraulic designP/F
Downpipe sizing per designP/F
Overflow provisions installedP/F
Leaf guards installed where specifiedBelow-Ground Stormwater
Requires sign-offP/F
Pit construction per design detailsP/F
Pipe grades per hydraulic design Hold
P/F
Pipe jointing per manufacturer specsP/F
Grated inlet levels per civil drawingsOn-Site Detention
Requires sign-offP/F
OSD tank volume per hydraulic report Hold Witness
P/F
Orifice plate sizing verifiedP/F
OSD water tightness test satisfactoryP/F
Connection to authority infrastructure approved Hold
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