GRIP Engineering provides practical, efficient and coordinated hydraulic engineering design services across New Zealand. We specialise in domestic water, sanitary drainage and associated hydraulic systems for commercial, residential and mixed-use developments, with a strong focus on functionality, coordination, compliance and buildability.

Our approach combines modern engineering workflows, AI-assisted design tools and real-world construction understanding to deliver streamlined hydraulic solutions that are efficient, cost-effective and practical to construct and maintain.

We work closely with architects, developers, contractors and project teams throughout all project stages — from concept planning and developed design through to detailed documentation, construction monitoring and commissioning support.

• Cold water reticulation design 
• Hot water system design 
• Centralised hot water systems 
• Heat pump hot water systems 
• Water pressure and flow assessments 
• Water storage solutions 
• Booster pump systems 
• Pipe sizing and routing coordination 
• Water efficiency strategies 
• Backflow prevention coordination 

• Sanitary drainage system design 
• Trade waste coordination 
• Gravity drainage systems 
• Pumped drainage systems 
• Vent system coordination 
• Below-ground drainage layouts 
• Civil drainage interface coordination 
• Fixture unit calculations 
• Drainage sizing assessments 
• Access and maintenance coordination 

• Concept hydraulic design 
• Developed design 
• Detailed hydraulic design
• Building Consent  
• Producer Statements 1 & 4
• Design & Build contractor support 
• Hydraulic specifications 
• Fixture schedules 
• Pipework layouts and coordination 
• Tender documentation 
• Construction documentation 
• As-built review support 

Designs are developed in accordance with applicable New Zealand Building Code requirements and relevant standards, with a strong emphasis on practical coordination, installation efficiency and long-term maintainability.