Kohimarama · Drainlayer
Drainlayer in Kohimarama
If roof runoff and wastewater appear to share a drain, start by sending Stately a sketch, photographs and any drainage plans.
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- Impac Prequal assessed
- Kiwi-owned since 2012
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Separating them means tracing both flows, confirming their permitted destinations and planning the changeover before excavation. Stately covers Kohimarama. For an owner or builder, the first decision is what needs investigating, not where a new trench should run.
Trace each source before choosing routes
Mark downpipes, outdoor drainage inlets, toilets, kitchens and bathrooms on your sketch. Include visible access points and the suspected shared pipe. Send plans showing proposed building work, paved areas and boundaries. Describe any previous alterations you know about. These details help organise the investigation, but the connections still need checking onsite.
We locate accessible drains, trace where each source discharges and check pipe condition, depth and direction. The investigation distinguishes a genuinely shared private drain from separate pipes running close together. Record which branches carry roof or surface water and which carry wastewater before deciding what stays, what moves and what needs replacing.
Confirm destinations and approvals before excavation
Two separate pipes need two appropriate destinations. Owners maintain private drains; Watercare manages public wastewater, while Auckland Council manages public stormwater. Confirm the receiving assets and connection arrangements with the relevant organisation. The designer checks the proposed routes and levels against the actual site information before excavation is programmed.
A new wastewater connection goes through Watercare's application, inspection and completion process. Excavation near its public pipes may also require approval. Check the separation scope against MBIE consent guidance and confirm consent requirements for the actual work. Restricted drainlaying needs an appropriately authorised person; check their authorisation through the PGDB register.
More about drainlayer in Kohimarama
Plan trenches around the live drainage
Agree how occupants will use toilets and other fixtures during the changeover. Identify which existing drain must remain working while the separate route is installed. Set out excavation areas, material storage and access for the work. Locate other buried services before digging, then expose the relevant junctions carefully to verify the layout.
Trench positions follow the checked route rather than the shortest line across the property. We check available levels, pipe support and clearance at crossings as excavation progresses. Any difference between the exposed drains and the planned arrangement needs resolving before more pipe is laid. Keep excavated areas protected and retain access to inspection points.
Separate branches and check the changeover
The pipework scope follows the confirmed layout. It can involve laying a separate stormwater line, diverting wastewater branches, replacing damaged sections and removing redundant cross connections. Each retained inlet must feed the correct system. Unused branches need proper closure so they cannot admit soil or leave an unintended route between the systems.
Schedule required testing and inspections before backfilling conceals the joints. Check the new work for leakage and verify that each source reaches its intended destination. For a new wastewater connection, coordinate Watercare's inspection and completion steps with the trench programme. Allow time to address findings before changing over the remaining live branches.
Close trenches with a clear record
Once the required checks are complete, backfill around the pipes with suitable support and compact the trench in stages. Agree the surface finish beforehand. Lawn, paving and concrete need different reinstatement arrangements. Record who completes each surface and whether the drainage handover includes a temporary finish or the agreed final reinstatement.
Keep an updated drainage drawing showing separate routes, connection points, access points and closed branches. Add photographs taken before cover, test results and relevant inspection or completion records. Walk through the finished layout with the owner or builder. Explain which access points must remain reachable and identify any surface work still to be completed.
Drainlayer: questions from Kohimarama
Can the existing shared pipe stay?
Its condition, route, levels and confirmed destination determine whether it can serve one separated system. That decision follows onsite investigation and the agreed drainage layout.
Should I disconnect a downpipe first?
No. Keep the current arrangement intact until its replacement route and changeover are planned. An open downpipe can discharge water beside the building or into the excavation.
When should the builder book paving?
Book final paving after testing, required inspections and trench backfilling. Confirm surface levels and access cover positions before the paving work starts.
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