Where We Work
From our Unanderra base, R.E. McMahon services industrial and commercial clients the length of the NSW south coast — from Helensburgh in the north, through Wollongong and the Illawarra, down to the Shoalhaven and Ulladulla.
Established 1966
Licensed Industrial Plumbers
RPZ & TMV Certified
Confined Space & Working at Heights Certified
Projects from $100 to $5M+
Wollongong
60+ years keeping the city's heavy industry running — Port Kembla steelworks, port and coal infrastructure, plus commercial, healthcare and aged care.
Illawarra
One of the Illawarra's longest-established industrial contractors. Steel, mining, energy, health and construction — from Helensburgh to Gerringong.
Shoalhaven
Licenced, fully-equipped industrial plumbing for Nowra and the coast — manufacturing, defence supply chain and aged care, with specialist credentials many regional contractors don't hold.
Trusted by Industry Leaders Across NSW
R.E McMahon has been testing our RPZ devices for many years now and have been extremly reliable. Any time I call for any other plumbing issues with our warehouse, they are on the ball and attend to the issue right away! Couldn't recomend more highly!..
Mitchell Lipscombe
We have used the services of McMahon's regularly over the past year. All different fibreglass requirements have been met in a timely and efficient manner.
Ivan Edgar
R.E. McMahon Industrial Plumbing did a great job for us. Professional, on time, and very knowledgeable with industrial work. They fixed our issue quickly and cleanly. Excellent service — highly recommend!
Blake Greenfield
Had the team at my house replacing my burst sewer. Job ended up being a lot more complicated then first expected, but Mcmahon’s took me through the whole process and gave me quite a few options. We ended up replacing my whole...
Zahlia Quigley
We had an emergency at a commercial site with a burst water main. Called the office & we had the issue made safe right away. They provided us a quote for full repair, I rang around and pricing was very competitive. Once accepted...
J&J Rendering Pty Ltd
