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From concept plumbing design through to construction, since 1980 Dennis Cairns & Associates hydraulic design consultants have been at the forefront of delivering the full spectrum of hydraulic and fire services design across a range of commercial, industrial and residential projects. DCA has recently been acquired by Sedgman, an Australian company which has been operating since 1979. Our quality services will continue from convenient locations in Brisbane, Perth and the Gold Coast.

Hydraulic Design

Dennis Cairns & Associates is here for the future. With a commitment to being the best at what we do, we are always looking at new ways of doing things and researching the latest technologies that will keep us at the leading edge of hydraulic and fire services. Our history of continuous expansion take our services throughout Australia by bringing the best in hydraulic and fire services design to companies both internationally and in Australia.

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Specialty Hydraulic, Plumbing Design Services:


•  Cold water reticulation
•  Hot water generation (including temperature control) and reticulation


•  Plumbing and Drainage
•  Vacuum Sewers


•  Gas distribution systems (Natural and LPG)

Fire Services

•  Fire hydrant and fire hose reel services
•  Fire sprinklers
•  Fire pump rooms


•  Drainage and sub-soil drainage
•  Syphonic drainage systems
•  Gutter and downpipe sizing


•  Plumbing and drainage
•  Pretreatment devices
•  Authority approvals

Environmental Solutions

•  Water conservation and auditing
•  Rainwater harvesting and re-use
•  Grey and waste water harvesting and re-use
•  Stormwater Management Plans

Reporting / Specifications

•  Design briefs
•  Design and Construct and full hydraulic services specifications
•  Bill of quantities schedules
•  Dilapidation reports
•  Monthly site inspections and reports
•  Peer review

BIM (Building Information Modelling) Services & 3D Documentation - Plumbing Design

• Construction Focused Modelling Team
• Designing As-Built Revit Models
• Coordinated Models through Revit & Navisworks
• Design Analysis
• Complete Bill of Quantities
• Asset Registers
• LOD 500 Capable


Consulting Services

We are committed to providing exceptional service and building great relationships with our clients and industry partners. For more information about our hydraulic consulting services, for general enquiries please get in touch.