Roof plumbing work involves a roof drainage system that.
Roof drains to stormwater retention tank.
Any work referred to in subregulation 1 that is carried out in relation to a freestanding class 10a building that has a floor area not exceeding 10 m 2 except where the class 10a building requires connection to a below ground drain or retention tank.
A detention tank sometimes the term retention tank is incorrectly used is usually called for when the existing stormwater infrastructure is not adequate.
These tanks may be above ground or buried.
Stormwater solutions are licensed drainage specialists catering to the whole range of drainage services including sump pump installation sealed water lines surface water lines unblocking of clogged drains and new stormwater system installations.
Basically a detention tank slows down how fast the rain off your roof gets into the stormwater under the streets.
The inlet elevation of secondary overflow drains and the invert elevation of overflow scuppers should be not less than 2 inches 51 mm or more than 4 inches 102 mm.
The retention tank receives water from roof downpipe and stores it for use in toilet flushing washing machines and or outside taps.
These tanks often have automatic top up from council supply to prevent them running out of water.
Typical roofing stormwater work.
For an efficiently running drainage system it is essential that it is professionally cleaned and serviced at regular intervals.
Excess water flows out a 100mm overflow to stormwater disposal.