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Living on the geothermal field has its perks — but the hydrogen sulphide in Rotorua's air and water is tough on plumbing. If your cylinders and fittings seem to wear out faster than they should, this is usually why.
Published 2026-06-01 · Rotorua Plumbers
Hydrogen sulphide (that classic Rotorua “sulphur” smell) reacts with copper and some metals, corroding hot water cylinders, fittings, valves and exposed pipework faster than in other towns. You'll often see blackened copper, pitted fittings and cylinders that fail earlier than the usual 12–15 years.
The fix is choosing materials and systems suited to local conditions — the right cylinder type, corrosion-resistant fittings, sacrificial anodes maintained, and keeping connections checked. We fit and service hot water with Rotorua's conditions in mind, so you're not replacing a cylinder every few years.
If your hot water smells off, you're seeing corrosion, or a cylinder more than ~10 years old is showing its age, it's worth a check before it leaks. We can advise repair vs replace and recommend the longest-lasting option for your home.
FAQ
Usually it's a nuisance rather than a danger, but it can signal corrosion or bacteria in the cylinder. Worth having checked, especially on older systems.
They can — geothermal hydrogen sulphide accelerates corrosion. Choosing the right materials and maintaining the anode helps a lot.
Yes — we select cylinders, fittings and systems suited to Rotorua's geothermal conditions so they last longer.
Local, licensed and upfront on price. Call now or send a quick message.
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Tell us what you need and we’ll get straight back to you. For burst pipes or blocked drains, call 07 807 4591.