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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.