Expert Stormwater Drainage Upgrade, Sub-Soil Drain Installation & Waterproofing For A Seven Hills Home
Our team attended a property in Seven Hills to complete a comprehensive stormwater and sub-soil drainage upgrade, including new pits, pumps, waterproofing, and rerouted downpipe lines to protect the home from water ingress and improve overall site drainage.
The job included:
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Marking out, cutting and removing sections of the concrete driveway for trenching new drainage lines.
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Excavating a trench from the front right corner of the home to the rear left corner for new sub-soil drain lines.
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Connecting existing channel grate drains and carport downpipes into the new drainage system.
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Excavating an additional trench to a second pit near the water meter for the stormwater main outlet pit.
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Supplying, installing and concreted two new drainage pits, ensuring correct levels and stable positioning.
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Prepared trench bases to achieve proper drainage fall.
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High-pressure cleaned the front wall below ground level, sealed cracks with sand/cement, and applied two coats of waterproof membrane to wall and footings.
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Installed builders plastic/core flute as a protective barrier along trench walls.
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Installed PVC main drain, full-length sub-soil drainage, and integrated multiple connection points.
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Installed new pumps inside pits and connected them to downpipe lines discharging to the street.
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Supplied and installed a weatherproof outdoor power point for the pump (installed by a licensed electrician).
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Core-drilled walls for rerouted downpipe drainage lines.
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Diverted downpipes and ran a charged line to the front boundary stormwater pit.
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Ran pump-out lines up the wall and connected into the rear left downpipe, directing flow through the charged stormwater system.
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Excavate a trench across the nature strip to the curb and core-drill the street kerb outlet.
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Filled trenches with 10–20mm aggregate over sub-soil drains and covered with geo-textile fabric.
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Backfilled all trenches, reinstated areas where concrete was removed, and secured all pipework with clips and saddles.
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Sealed around all penetrations and pits, removed spoil via an onsite skip bin, and thoroughly cleaned all work areas.
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Fully tested and commissioned the entire drainage system.
This was a big job but our plumbers handled it well, ensuring that everything was safe and compliant with Australian standards. For all your stormwater drainage needs, call our expert plumbers on (02) 8188 5339
