Need hydraulic or stormwater design for your project?
From single homes to multi-residential, commercial and industrial developments, Opal Water Management helps with hydraulic and stormwater design. Send us your project details and plans to get started.
Get started with your hydraulic or stormwater design enquiry
Hydraulic Engineering & Design
Modern building developments demand robust, compliant hydraulic engineering to satisfy Local Council Development Consent (DA) conditions, National Construction Code (NCC) standards, and water authority guidelines.
Opal Water Management delivers full-scope hydraulic design for residential multi-dwellings, commercial fit-outs, industrial warehouses, and institutional facilities.
Our hydraulic engineering team produces fully coordinated CAD drawings, On-site Stormwater Detention (OSD) modeling, trade waste pre-treatment designs, and fire service booster layouts ready for certifier approval.
Opal Water Management works in tandem with GHP Plumbing & Civil, ensuring that every hydraulic engineering design is not only statutory compliant but practical and cost-effective to construct.
Who This Service Is For
- Architects and building designers requiring hydraulic services documentation for DA/CC
- Commercial developers constructing multi-story residential or commercial buildings
- Industrial operators needing Sydney Water Trade Waste pre-treatment approvals
- Civil builders needing On-site Stormwater Detention (OSD) and council catchment compliance
How Opal Water Management Assists
Analysis of Local Council DA conditions, catchment hydrology, and water authority connection points.
Comprehensive engineering design for sanitary drainage, trade waste, hot/cold water, gas, and fire services.
Hydraulic computer modeling for On-site Stormwater Detention (OSD) and rainwater harvesting retention systems.
Certification of hydraulic designs for Construction Certificate (CC) and Complying Development Certificate (CDC) lodgement.
What to Provide With Your Enquiry
To assess your project promptly, please supply as much of the following as you have available. You can attach these documents directly in the enquiry form above.
- Architectural plans (PDF or DWG) showing building layout, levels, and intended fixtures
- Council DA consent conditions, including any OSD, stormwater, or trade waste requirements
- Site survey with levels, boundaries, and existing service connection points
- Any authority or water corporation requirements relevant to the site
Key Deliverables & Documentation
- Hydraulic CAD Construction Drawings (Sanitary, Stormwater, Water, Gas, Fire)
- Council-Compliant On-site Stormwater Detention (OSD) Calculations
- Sydney Water Trade Waste Agreement & Pre-Treatment Specifications
- Design Compliance Certificates for Certifier Sign-off
Prefer a Direct Discussion?
Speak directly with an accredited Water Service Coordinator at our Sydney HQ or Regional Dubbo hub.
Related Services
Building Plan Approvals (Tap-In)
Assessment and lodgement for building near or over Sydney Water assets.
Sydney Water Major & Minor Works
Civil water and sewer main extensions required for site connections.
CCTV Inspection & Service Location
In-ground asset locating to inform hydraulic design tie-in points.