John Jordan Plumbing Design and Certification

John Jordan Plumbing Design and Certification is a Darwin based practice with more than thirty years in the plumbing and gas industry. We specialise in the design and certification of hydraulic services for residential and small commercial builds, renovations, and unit complexes. Our work spans domestic hot water systems, blocked drains, roof plumbing, gas fitting, and expert pipe relining, with a clear focus on compliance and practical outcomes. We provide detailed hydraulic design, asset management, and regulatory reporting to help clients achieve timely approvals and durable installations. Our team delivers project management from initial concept to final certification, ensuring every phase aligns with AS/NZS 3500 standards and relevant regulations.

We offer a full spectrum of services, including site surveys, leak detection, water loss management, and certified reporting for unapproved works. We handle design and certification for sewerage, stormwater, hot and cold reticulation, septic systems, wastewater treatment plants, LPG and natural gas systems, and both above and be...