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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
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Checklist Preview

Roof Drainage

Requires sign-off
P/F
Gutter sizing per hydraulic design
P/F
Downpipe sizing per design
P/F
Overflow provisions installed
P/F
Leaf guards installed where specified

Below-Ground Stormwater

Requires sign-off
P/F
Pit construction per design details
P/F
Pipe grades per hydraulic design
Hold
P/F
Pipe jointing per manufacturer specs
P/F
Grated inlet levels per civil drawings

On-Site Detention

Requires sign-off
P/F
OSD tank volume per hydraulic report
Hold Witness
P/F
Orifice plate sizing verified
P/F
OSD water tightness test satisfactory
P/F
Connection to authority infrastructure approved
Hold

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