Quick answer:The Rinnai Enamel Outdoor 180L is a vitreous enamel mains pressure electric hot water cylinder — $4,099 incl GST fully installed across Auckland by Water & Gas Worx. Price includes the unit, removal of your old cylinder, plumbing connections, electrical reconnection, and Rinnai warranty registration. Installed by Peter — licensed plumber. Call 0800 322 322.
About the Rinnai Enamel Outdoor 180L
The Rinnai Enamel Outdoor 180L is Rinnai's flagship outdoor electric cylinder for Auckland's mains pressure homes. Where the Rheem Optima has a broader diameter, the Rinnai Enamel has a slimmer profile — at 508 mm across — which makes it the better fit for narrow alcoves, tight side passages, or external walls with limited clearance. The vitreous enamel tank is built for coastal New Zealand conditions.
The 10-year cylinder warranty and Rinnai's nationwide service network make this a dependable long-term installation. Rinnai designed this unit specifically for New Zealand's coastal environments — the enamel coating and sacrificial anode system are tuned for the salt-air and high-humidity conditions that accelerate corrosion in inferior units. Auckland properties near the coast or estuary benefit particularly from this design.
We are a Rinnai-certified installer and carry the Enamel Outdoor 180L in our standard supply schedule. Installations are available Auckland wide — from Orewa and Whangaparaoa in the north through to Papakura and Karaka in the south. A standard swap from an existing outdoor cylinder takes three to five hours.
Technical Specifications
| Capacity | 180 litres |
| Type | Mains pressure, outdoor-rated |
| Element | 3 kW |
| Material | Vitreous enamel |
| Warranty | 10-year cylinder, 2-year parts |
| Dimensions (H × dia) | 1,070 mm × 508 mm |
| Weight (empty) | 52 kg |
| Recovery rate | ~120 L/hr at 40°C rise |
| Suitable for | 3–4 people |
Why This Unit for Auckland?
- — Installed across Auckland since 2009 — we know these units and the conditions they run in
- — Fixed pricing with no surprises — what we quote is what you pay
- — Licensed plumber and gasfitter — all certification included
- — Same-week installation available in most Auckland suburbs
- — Old unit disconnected, removed, and disposed of — nothing left for you to deal with
Frequently Asked Questions — Rinnai Enamel Outdoor 180L
What is the Rinnai Enamel Outdoor 180L installed price in Auckland?
The Rinnai Enamel Outdoor 180L is $4,099 incl GST fully installed. This includes the unit, old cylinder removal and disposal, plumbing connections, valve pack, electrical reconnection, and warranty registration.
How does the Rinnai Enamel compare to the Rheem Optima 180L?
Both are outdoor mains pressure vitreous enamel cylinders with 10-year warranties. The Rinnai Enamel is slimmer — 508 mm diameter versus 520 mm for the Optima — which can matter in tight spaces. The Optima has a 3.6 kW element versus the Rinnai's 3 kW, so the Optima recovers slightly faster. Price is similar. Choice often comes down to which fits the available space best.
Is the Rinnai Enamel suitable for coastal Auckland properties?
Yes. The vitreous enamel coating and sacrificial anode system are well suited to coastal conditions. Rinnai designed this range for New Zealand's coastal environment specifically. We recommend annual anode checks in high-salt-air locations to extend cylinder life.
How often does the anode need replacing on the Rinnai Enamel?
Anode condition should be checked every 3 to 5 years. In coastal or high-chloride water areas, check every 2 to 3 years. A spent anode left unreplaced allows the enamel tank to rust from the inside — anode replacement is cheap insurance against a far more expensive cylinder replacement.
Does the Rinnai Enamel Outdoor 180L work with solar hot water?
The Rinnai Enamel is a standard electric cylinder. It does not have a solar coil or solar input fitting as standard. If you are integrating solar, you would need a cylinder designed for solar boost — talk to us about the right specification.
What size space does the Rinnai Enamel Outdoor 180L need?
The cylinder is 1,070 mm tall and 508 mm in diameter. Allow at least 200 mm clearance on each side for air circulation and maintenance access. It can be wall-mounted or ground-mounted on a stand.
How long does a Rinnai Enamel Outdoor 180L installation take?
A direct swap from a similar outdoor cylinder typically takes three to five hours. We handle everything — disconnection and removal of the old unit, installation of the new cylinder, plumbing, electrical, and warranty registration.
