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Rinnai Stainless Steel Mains Pressure
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Manage, maintain, and master your hot water system.

Rinnai Stainless Steel Mains Pressure

Hot Water Cylinder

Register your warranty

To ensure your full Rinnai manufacturer's warranty is active, please make sure to register your cylinder online via the Rinnai New Zealand website using the details provided in your handover pack. Keep these installation details handy for your records, or in the unlikely event you need to make a claim:

Installer

Hot Water Shop

Company City

Christchurch

Install Date

Please refer to your invoice.

System Serial No.

Found on the silver rating plate located on the side of your cylinder.

Register your Rinnai Warranty

Register

Need to make a warranty claim?

Make a claim

Understanding your system

This premium indoor cylinder is constructed using high-durability stainless steel, optimizing heat transfer and delivering pristine hot water pressure.

User Manual

Anode-free peace of mind

Because it is high-grade stainless steel, there is no sacrificial anode to check or replace over time, lowering your ongoing service costs.

Superior efficiency

Exceptionally low heat loss performance means the system uses minimal electricity to keep your water sitting hot.

Routine servicing and system care

To prolong the lifespan of your cylinder and keep it running smoothly, follow this simple maintenance schedule.

Every 6 months - Homeowner Check

Ease the TPR valve

Pull open the lever on your TPR valve for a few brief moments to clear out internal grit. Make sure it snaps back securely into a drip-free close.

Safe Tray Check

Keep an eye on internal safe trays to make sure they remain bone dry.

After 12 months - Professional Service

After the first 12 months, this initial service is vital as it determines the level of ongoing maintenance needed specific to your location and environment. To keep your system running optimally for its full lifespan, book this annual check-up with Hot Water Shop. Our technician will check element integrity, test electrical connections, clean inline filters, and ensure all pressure reduction valves are working flawlessly.

Book a Routine System Service

Quick Fixes

Before calling for service, double-check these simple fixes:

No hot water at all

Confirm that your electrical board breaker hasn't tripped off.

Lukewarm water

if you run out of hot water much faster than usual, one of the internal heating elements or its controlling thermostat may need adjustment or replacement.

Tim’s Efficiency Tips

The 60°C sweet spot

By law in NZ, stored hot water must be kept at a minimum of 60°C to prevent legionella bacteria. Your cylinder's internal thermostat is calibrated to balance maximum health safety with efficient power usage.

Target shower flow rates

Mains pressure systems can push 12–15 litres per minute through an unrestricted showerhead. Fitting a 3-star WELS showerhead (~7.5 to 9 L/min) cuts hot water draw by roughly a third, significantly reducing the kWh required for daily recovery.