boundary-trap-riser
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boundary trap riser
Standards
a vertical shaft that extends the inlet leg of a boundary trap to ground surface level to provide access to the drain for inspection, cleaning and maintenance purposes. The riser may be sealed with an airtight cap or terminate as a ground vent
Source - AS/NZS 3500.0:2003: Plumbing and drainage
HB50
shaft which extends the inlet leg of a boundary trap to surface level to provide access to the drain for inspection, cleaning and maintenance purposes
The riser may be sealed with an airtight cap or terminate as a ground vent.