Drainlayers are tradespeople who have expertise in the laying, repair and planning of drains. Their work involves drain laying lasers, external lasers, theolodites, pipe stoppers, sewer sealing cushions, cable avoidance tools, surveying equipment, mandrills, manhole shutters, tripods, winches, harnesses, and manhole equipment.
Correctly installed drainage systems play an important role in protecting public health and maintaining a pollution-free environment. Drains are underground pipes which carry foul or surface water (stormwater) and enter either an onsite waste water disposal system (septic tank) or a sewer.
A drainlayers work must comply with the Building Code and where a building consent is required, the work must be checked by the building inspector from the building control authority in your area (your local council). A code compliance certificate cannot be issued until the work has been signed off by the building inspector.
People who are not registered as drainlayers are able to clear blocked drains, but only if this does not involve altering or repairing the inspection pipe or ventilation pipe in any way.
Certified or licensed drainlayers can lay, alter, reconstruct, extend, repair and open up drains and associated traps and connect drains up to and away from waste water treatment stations (septic tanks).
The most common problem that occurs with a drain is blockage due to foreign matter dropped down the drain, tree root intrusion, overloading, collapse or misalignment.
A blockage in a drain will usually require the services of a tradesperson who can clear the blockage. Clearing a blocked drain is not regarded as drainlaying, however, anytime a drain is opened up, altered, reconstructed, extended or repaired then that work can only be legally undertaken by a licensed drainlayer.