Illawarra's Industrial Plumbing Specialists Since 1966
Licensed, fully equipped, and trusted by the region's largest industrial operators for over 60 years. From fabrication and installation to maintenance and repairs, we deliver reliable industrial plumbing solutions.
Established 1966
Licensed Industrial Plumbers
RPZ & TMV Certified
Confined Space & Working at Heights Certified
Projects from $100 to $5M+
R.E. McMahon Industrial Plumbing
When the Job Is Complex, We're the Team You Call
R.E. McMahon is one of the Illawarra's most experienced industrial plumbing companies. Based in Unanderra, we work with commercial businesses, industrial operators, construction contractors, and government bodies across Illawarra, Shoalhaven, and Sydney. When the job is complex, high-risk, or technically demanding this is who you call.
Our Services
Specialist solutions for complex industrial environments, critical infrastructure, compliance systems, and ongoing facility maintenance.
General Plumbing
Maintenance, repairs, hot water, gas fitting, drainage, and site services — for commercial and industrial premises.
Industrial Plumbing
Water treatment plants, sewage treatment, chemical processing, mines and ports, heavy industry, dust suppression. We handle the work others can't.
Backflow Prevention (RPZ) & TMV
Certified testing, annual lodgement, repairs, and installation. Once you're on our database, we contact you automatically each year.
FRP Fabrication
Specialist fibreglass and plastic fabrication — tanks, pipes, structures. We carry specialist equipment not available elsewhere in the region.
Pipe Fabrication
Stainless steel, mild steel, PVC, PE, PVDF, polypropylene, FRP — fabricated in our Unanderra workshop and installed on site.
Fire & Suppression Systems
Industrial fire, deluge, dust suppression, gas suppression and VESDA systems across mining, heavy industry, aged care, and commercial.
Why the Illawarra's Biggest Operators Trust R.E. McMahon
60 years of doing the difficult work
Founded in 1966, we've built a reputation by completing technically demanding projects often when other contractors haven't been able to. Our client history includes BlueScope Steel, BHP/South32, Sydney Water, Orica, Port Kembla Coal Terminal, and NSW Trains.
A team qualified for where others can't go
Confined space entry, RPZ and TMV certification, hydrostatic pressure testing, FRP laminating, hazardous areas, working at heights, and high-risk work licences. We carry the qualifications required for demanding industrial and commercial projects.
Our own plant and equipment
Two large fabrication workshops, specialist plastic and metal welding equipment, excavator, backhoe, tip truck. If the equipment exists in the Illawarra, we likely own it.
We don't subcontract what we Can't handle
Our team designs, fabricates, installs, commissions, and maintains. From $100 callouts to $5M+ projects we scope it, price it, and deliver it.
Well-Stocked for Faster Service
Our extensive inventory of plumbing materials helps us complete repairs, maintenance, and installations without unnecessary delays.
Trusted By
Alliance plumbing contractor to BlueScope Steel since 1995.
Serving Illawarra, Shoalhaven & Beyond
Based in Unanderra, we regularly work across the Greater Wollongong area, Port Kembla, Shellharbour, Kiama, and throughout the Shoalhaven including Nowra and surrounds. We also travel to Sydney and Canberra for the right project.
Canberra
Nowra
Kiama
Shellharbour
Port Kembla
Unanderra
Wollongong
Sydney
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
