Hydraulic Services Design & Documentation
Hydraulic Systems Designed for Performance, Installation and Long-Term Use.
Flow Consulting designs hydraulic services for new buildings, refurbishments and complex developments throughout New Zealand. Our work covers internal plumbing and drainage, external service connections, water reticulation and specialist systems tailored to each project.
Our consultants apply first-hand plumbing, gasfitting and drainlaying experience to system selection, pipework layouts, plant requirements and coordination with other building services. We consider how each system will be installed, accessed, operated and maintained—not simply how it appears on a drawing.
We develop hydraulic calculations, drawings, details, scopes of work and specifications that translate project requirements into clear technical information for consenting, procurement and installation.
Practical Hydraulic Design
Our Hydraulic Design & Documentation Services Include:
Hot, cold and non-potable water supply and reticulation
Sanitary plumbing, sewer and drainage systems
Stormwater, conventional and siphonic roof drainage
Trade waste drainage and treatment systems
Domestic and commercial wastewater treatment and on-site disposal
Rainwater harvesting, retention, detention and reuse systems
Water storage tanks, pumping, filtration and treatment systems
Hot water generation, including electric, gas, solar, heat pump and heat recovery systems
Natural gas and LPG reticulation
Backflow prevention and cross-connection assessments
Hydraulic calculations, design drawings and installation details
Building Consent, tender documentation and project-specific specifications
Construction observation, technical support and design reviews
Hydraulic Design Built on Experience
Designed with Construction in Mind
Our design process considers pipe routes, gradients, available space, service access, equipment positioning and connections to existing infrastructure. These practical decisions can affect installation efficiency, system performance and future maintenance.
We assess water demand, drainage requirements, building layout, site levels and existing services alongside the project’s operational needs. This helps us select and document systems appropriate to the building and its intended use.
For multi-storey buildings, industrial facilities and specialist environments, we coordinate the requirements of multiple hydraulic systems while accounting for the constraints of each site and construction programme.
Detailed Documentation & Specifications
Clear Information for Consenting, Tendering and Construction
Our design deliverables can include hydraulic layouts, riser diagrams, schematics, installation details, calculations, equipment schedules, scopes of work and project-specific technical specifications, according to the project scope.
These documents identify system arrangements, materials, equipment, connection points and relevant installation and workmanship requirements. They provide the technical detail needed to review the proposed design and establish a consistent tender scope.
Clear drawings and specifications also support coordination with other disciplines and help project teams identify questions before work reaches site, reducing avoidable ambiguity during construction.
Construction Support & Compliance
Supporting Projects Beyond the Design Stage
Our involvement can continue throughout construction with technical clarification, design amendments, shop drawing reviews and site observations where required.
We work alongside contractors and project teams to address installation challenges, maintain design intent and support compliance, testing, commissioning and project handover.
Plumbers Designing for Plumbers
Our industry experience underpins every stage of the design process — delivering documentation that works not only on paper, but on site.