OTG is committed to providing specialised hydraulic guidance and confidence in design and reliability.

Since its inception, OTG Group has become a leading name and provider in hydraulic design and drafting to Perth’s booming building and construction industry. Clients, just like you, are provided access to specialist hydraulic services and engineers, all of which are dedicated to meeting deadlines and overcoming project challenges. Client focus and satisfaction is very important to us. So, we make sure to carefully listen and collaborate with you across every stage and contact. Why? To ensure the bit-fit hydraulic design and adherence to strict project requirements. You can count on OTG Group to strategise and deliver outcomes that are cost-effective, energy-efficient and compliant, tailored to what your project needs.

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Why Choose OTG Group?

Direct Contact with Project Manager

Nobody likes getting the run around when it comes to engaging a hydraulic consultant or plumbing consultant. Fortunately, when you work with OTG Group, you never will! And that’s our promise. Every project guarantees direct contact with a project manager who owns/operates OTG Group and has a vested interest in your project outcome.

Dedicated To Finding Innovative Solutions

Our small, but highly experienced team hold the company’s vision and value to all that we do. One value is believing that truly innovative design solutions are made possible through continuous learning and sharing of ideas. We work together to find and replicate innovative hydraulic design as Perth hydraulic consultants.

Practical On Site Knowledge & Experience

You can experience true peace of mind knowing that all OTG Group’s hydraulic consultants hold valid licences in plumbing, gas fitting and draining within Western Australia. This allows each consultant to bring their own individual, industry knowledge and practical experience to each site through advice and end-goal hydraulic solutions.

Professional & Cost Effective Outcomes

With over 20 years of experience within the Perth commercial and construction sectors, we know that professional AND cost effective outcomes go hand in hand. It’s because of this that OTG Group are often the go-to Perth hydraulic consultant of choice due to a reputation built on trust and excellent outcomes.

Licensed Plumbers, Drainers & Gas Fitters

Our specialised experts in the trade bring an added advantage to your hydraulic consultant and plumbing consultant requirements. You can count on our specialised, Perth-based team to conduct due diligent, concept design, plumbing estimating, approvals and so much more!

Covered by Public Liability Insurance

Regardless of project size, our teams always put delivery outcomes first. For your peace of mind, know that all our workmanship is public liability insurance. Also, we’re proud of out ‘open book’ approach with stakeholders and embrace full accountability. We believe in working together towards common goals that benefit project outcomes.

Our Comprehensive
Hydraulic Design Services

When you trust in OTG Group for your hydraulic design services, you’re guaranteed practical, high standard outcomes. Professional clients such as architects and developers engage us for a range of comprehensive hydraulic services. These include due diligence, feasibility studies to detailed concept designs. Clients also rely on us to provide budget estimates, cost plans and tender evaluations, as well as organise plumbing estimates, approvals and development applications, contract administration and construction support. Our hydraulic design services include potable hot and cold water systems, recycled cold water systems, sanitary plumbing and drainage, fire hydrant and hose reel services, hydraulic estimating and more.

Due Diligence

Feasibility studies

Concept Design

Detailed Design

Development Applications

Plumbing approvals

Budget estimates

Value management

Cost plans

Tender evaluation

Contract Administration

Construction Support

Facility Management

Plumbing estimating

Deem to satisfy designs

Services auditing

Peer reviews

Installation inspections


Existing Conditions Audits

Building Information Modelling (BIM)

Our Latest Projects


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Bringing Over 20 Years Of Industry Experience

Russell brings over 20 years of industry experience to OTG Group. His career started as a plumbing apprentice before moving to a licensed plumbing contractor and evolving into becoming a commercial hydraulic estimator. Now, Russell and his small, Perth-based team are proud to have services a range of diverse clientele as Perth hydraulic and plumbing consultants. OTG Group have proudly worked on food processing facilities, fuel stations, recycling facilities, medical centres, mining accommodation camps, retail shopping centres and premium residential properties (just to name a few). If innovative hydraulic solutions and professional, cost-effective outcomes are important to you – rely on OTG Group. They’re important to us too.

Our Principal Consultant, Russell Green