About us

We’re not a big outfit, and we don’t want to be. Being a small, close-knit team means we can focus on the job at hand, invest in our people, and deliver high-quality work without spreading ourselves thin. We’re not trying to be the biggest, just the best at what we do; showing up when we say we will, working efficiently and thoroughly, and standing by the results.

The Team

Certified Craftsman Plumber and Certified Drainlayer

Rohan began his plumbing career in 2005 as an apprentice in his family’s business; Mahon Plumbing. After an OE and honing his skills in London with high-end plumbing firms, he returned to Invercargill with a vision to build something of his own. In 2014 Rohan Mahon Plumbing & Drainlaying was born. He is hands-on, detail-focused, and genuinely takes pride in delivering top-quality workmanship to every client.

Rohan Mahon

Tradesman Plumber and Drainlayer

Connor joined the team in 2020 as an apprentice and quickly earned his tradesman qualifications in 2025. He’s known for his strong work ethic, reliability, and the pride he takes in every job. Connor approaches each task with a positive attitude and a focus on doing things right the first time. He’s a valuable part of the team and someone our clients can trust to deliver quality workmanship.

Connor Wylie

Frequently asked questions

Yes, we sure are!
As registered plumbers and drainlayers, we make sure that all of our workmanship is compliant with local Council building standards.

Your home’s plumbing and drainage systems are complex networks of pipes and fittings that handle high pressures, temperatures, gas, and even electricity. Poor workmanship or unlicensed work can put your family's health and safety at risk, and may also void your insurance. That’s why it’s crucial to choose a registered professional. Learn more at www.pgdb.co.nz or check out the video below.
Plumbing, drainlaying and gasfitting are skilled trades that require rigorous training and certification. In New Zealand, there are four or more levels of certification, each representing a different level of qualification and responsibility:
1. Certifying - The highest qualification, where the person is fully qualified and registered. It takes at least 6 years of training and study. They are responsible for both their own work and that of anyone they supervise.
2. Tradesman - Qualified and registered and usually work independently. However, a certifying tradesperson (supervisor), is ultimately responsible for ensuring that the work is done competently.
3. Restricted - Qualified with a trade certificate but not yet certified. They are registered and authorized to do the work under supervision.
4. Limited Certificate/Trainee - In training and working under supervision of a certifying person who is ultimately responsible for ensuring the work is done competently.
Check out the video below.
Yes, we offer free quotes. Just get in touch with us, and we’ll arrange a time to visit and assess the work you need. Either give us a call, email or fill out our form here.
Common signs include unusually high water bills, damp spots, mould, or the sound of running water when taps are off. If you suspect a leak, give us a call, we can help find and fix it.
Yes, when problems aren’t easy to spot we coordinate with experienced contractors to provide CCTV drain inspections. Using specialised cameras, we can identify cracks, tree root intrusions, blockages, and other hidden issues without any invasive digging.
If your water is too hot, it could be an electrical fault with the thermostat, or you might need a new tempering valve. We’ll help you figure it out and get it sorted.