Efficiency Unleashed
Hydraulic Design Built on Practical Plumbing Experience
Practical, coordinated hydraulic design for architects, builders and project teams. We design water, drainage, stormwater, gas and wet fire services with clear documentation that supports construction.
Compliant
Designed to the applicable NCC provisions and Australian standards for building hydraulics, ready for the certifying process.
Coordinated
Resolved against architecture, structure and the other services before issue, so clashes are not discovered on site.
Constructable
Detailed with pipe, plant and sequence in mind. Practical plumbing and site background is part of the product.
Building hydraulics
Services
Sewer, water, stormwater and roof drainage, gas, trade waste and wet fire. Documented so contractors can build from the set, not invent the missing pieces.
Sewer and sanitary drainage
Building sanitary plumbing and drainage designed so waste leaves the building cleanly, with falls, vents and fixtures resolved before construction.
View serviceWater services
Potable cold and hot water, including storage, boosting and metering where the building needs them, coordinated with plant space and architecture.
View serviceStormwater and roof drainage
Roof, balcony and building stormwater hydraulics: gutters, downpipes, overflow and internal rainwater pipework sized and documented for the building.
View serviceGas services
Natural gas and LPG pipework for building services, from meter to appliance, documented for installers and for certification.
View serviceTrade waste
Pre-treatment and drainage for commercial kitchens, laboratories and process areas so discharge can meet the water utility's requirements.
View serviceWet fire services
Hydrants, hose reels and sprinkler pipework as hydraulic design, coordinated with the rest of the building services. Not a substitute for fire engineering.
View service
Why OTG
Site-aware design, issued as a consultancy
Volume drawing mills optimise for speed and a low fee. That is not this office. We scope the work so the documentation is fit for construction, for coordination, and for the questions a builder will actually ask.
Practical plumbing and site background shows up in the detailing: access, set-outs, plant space, and the difference between a drawing that looks complete and a drawing a contractor can follow.
If a hydraulic system is already in dispute, the same discipline applies to forensic review and expert witness work. That lane is independent of design commissions.
Next step
Request a fee proposal
Send the drawings, the programme and the hydraulic services in scope. We will come back with a clear proposal.