Hot Water Cylinder Replacement & Installation
New cylinders and upgrades, fitted by Master Plumbers.
Free on-site visit and quote
Time for a new hot water cylinder?
If your hot water cylinder is leaking, running out of hot water or getting on in years, it may be time to replace it. We replace, install and upgrade hot water cylinders across Rodney and North Auckland.
Not every problem needs a new cylinder. If a repair is the better option, we’ll tell you. See hot water cylinder repairs.
Signs your cylinder needs replacing
Most homeowners start noticing small issues before the system fails completely. You might need a new system if:
- You’re running out of hot water regularly
- Your water temperature is fluctuating
- Your power bills are increasing
- Your cylinder is leaking or showing signs of wear
- Your cylinder is more than 10 years old and starting to play up
Hot water systems naturally become less efficient over time, and replacing them can improve both performance and energy efficiency.
Still not sure? Read how to tell if your hot water cylinder needs replacing.
Call us to book a free on-site visit.
Replacement, installation or upgrade: what’s the difference?
Replacement
Replacing an existing cylinder with a new one, the most common job.
Best when:
- Your current system has failed
- Repairs are no longer cost-effective
- You want improved reliability
New Installation
Installing a hot water system where there isn’t one yet, or as part of a build or renovation.
Includes:
- System selection and sizing
- Full setup and connections
- Ensuring everything is compliant and safe
Upgrade
Improving your existing system for better performance or efficiency. Common upgrades:
- Low pressure to mains pressure
- Larger cylinder for growing households
- Switching to energy-efficient systems
What happens when we replace your cylinder
A hot water cylinder replacement with Aqua Works, step by step.
1
Free on-site visit
We look at your current cylinder, your water supply and pressure, and where the new one will go.
2
Options and a written quote
We explain your options, from size to mains pressure or a heat pump, and give you a written quote before any work starts.
3
Installed, usually in a day
Our plumbers fit the new cylinder, valves and seismic restraints to the NZ Building Code, and take the old one away.
4
Tested and explained
We test everything, check the temperature and show you how your new system works.
A recent cylinder replacement
Before and after, plus the seismic restraints we fit on every new cylinder.
Before: a 2006 mains pressure cylinder in a stairwell cupboard.
After: a new mains pressure cylinder in the same cupboard.
Every new cylinder is strapped in with seismic restraints.
Not sure if you need a replacement, a new installation or an upgrade?
We’ll point you in the right direction!
Aqua Works are your trusted local plumber.
We are Master Plumbers and are On-Call 24/7
Choosing the right hot water cylinder
One of the biggest challenges is knowing which system is right.
We help you answer questions like:
- Which cylinder suits your household size?
- How much hot water do you actually need?
- Should you upgrade to mains pressure?
- Is a heat pump system worth it?
Every home is different, especially with a mix of rural and mains water supplies. Therefore, we tailor the solution to your setup. You will get clear, practical advice, not guesswork.
On tank water? A mains pressure cylinder needs a pump that can keep up. We look after water pumps too, so we check your whole system, not just the cylinder.
Call to talk to our plumber about your best options.
Your hot water system options
We keep things simple and straightforward:
Standard Hot Water Cylinders
Reliable, cost-effective systems suitable for many homes.
Mains Pressure Systems
Stronger performance and consistent flow across your home.
Heat Pump Water Heaters
Energy-efficient systems that can significantly reduce running costs. See heat pump water heaters.
We’ll help you choose the right option based on your needs and budget.
Our customers love to recommend Aqua Works…
⭐⭐⭐⭐⭐
“Great service from Troy of Aqua Works. Leaking hot water cylinder. Troy made time the next day to install the new one. They were responsive, timely and cleaned up well after the job was done. Highly recommend.“
Karen Compton, 2026
⭐⭐⭐⭐⭐
“October 2025: Troy and his team disconnected our old leaking solar hot water heater on the roof, and fitted our new heat pump hot water cylinder. All smoothly co-ordinated with a minimum of fuss and disruption. Excellent job guys!“
John Sibley, 2025
⭐⭐⭐⭐⭐
“What incredible service! Our hot water cylinder sprang a leak and showed all signs of needing a replacement. Steve from Aqua Works arranged for a replacement and installation kit to be delivered to us so that Troy could get it sorted when he arrived. We were delighted when Troy affected a repair to our current cylinder and there was no need for a replacement. When the job was done, Troy removed the unused new cylinder. We cannot recommend this wonderful team enough for their professionalism and communication throughout the whole project.“
Ann Yates, 2026
Why choose Aqua Works for your hot water cylinder replacement
Specialists in Hot Water & Water Systems
We are not just plumbers. We focus on water systems, including hot water, pumps, and filtration, so you get advice and installations done properly.
Up-to-date with Modern systems & technologies
We work with current hot water technologies, including mains pressure upgrades and energy-efficient systems. You won’t get outdated solutions, only what works best today and in the future.
Tailored solutions, not one size-fits-all
Every home is different. We take the time to assess your entire setup and recommend a system that suits your household, water supply, and long-term needs.
Honest advice you can trust
If a repair is the better option, we’ll tell you. If it’s time to upgrade, we’ll explain why. Our focus is on the right solution, not the biggest job.
Professional work, backed by a local team
You get the best of both: a local team that’s easy to deal with and workmanship done to a professional standard.
Hot water cylinder replacement FAQs
Do I need a new hot water cylinder, or can it be repaired?
Not always. Many faults, like a failed element, thermostat or valve, can be repaired. If the cylinder itself is leaking or near the end of its life, replacing it is usually better value. We’ll give you honest advice either way.
Why did my old hot water cylinder fail so soon?
Often it’s the water. Unfiltered tank water leaves sediment in the bottom of the cylinder, and bore water or rainwater with a low pH eats copper and breaks down enamel linings. With the water right, a good cylinder lasts 10 to 20 years; with it wrong, it can fail in 6 to 12. We can test your water and recommend treatment, so your new cylinder lasts. See how your water affects your hot water cylinder.
How much does it cost to replace a hot water cylinder?
It depends on the cylinder size and type (low pressure, mains pressure or heat pump), where it goes, and any pipework or electrical changes. We’ll give you a free written quote after a site visit.
How long does a hot water cylinder replacement take?
Most installations can be completed within a day, depending on the complexity of the job.
Can I upgrade my hot water cylinder to mains pressure?
Yes, many homes can be upgraded, which significantly improves water pressure and comfort.
Call us to talk to our plumbers and get a free quote!
What’s the difference between hot water cylinder installation and replacement?
Replacement involves swapping an existing system, while installation typically refers to new systems in builds or renovations. We handle both. Call us to book a job.
What size hot water cylinder do I need?
It depends on how many people live in your home, how many bathrooms you have and how you use hot water. We size it for your household at the site visit, so you don’t run out or pay to heat water you don’t use.
Can a hot water cylinder be installed outside?
Yes, hot water cylinders can be installed outside, especially when space inside is limited or during renovations. Outdoor systems are designed to be weatherproof and installed safely to meet compliance standards.
We’ll assess your property and recommend the best location to ensure performance, durability, and easy access for future servicing.
Give us a call to book a free on-site visit.
Which areas do you cover for hot water cylinder replacement?
We replace and install hot water cylinders across Rodney and North Auckland, including Warkworth, Matakana, Snells Beach, Omaha, Leigh, Mangawhai, Orewa, Silverdale and Whangaparāoa.
Hot water cylinder replacement across Rodney
We replace and install hot water cylinders in Warkworth, Matakana, Snells Beach, Omaha, Leigh, Mangawhai, Orewa, Silverdale, Whangaparāoa and the areas around them.
Need a repair instead? See hot water cylinder repairs. No hot water right now? See emergency hot water, or browse all our hot water services.
Hot water cylinder brands we install and replace
We design, install and service all leading brands, makes and models of hot water cylinders. If you cannot find your model below, call us to find out how we can help.