Rinnai Stainless Steel Mains Pressure Indoor Hot Water Cylinders

Priced From

$1,407.00 inc GST


Please note: For off shore island or international purchases you will need to create a 'Quote List' or simply contact any store and our friendly team will assist you.

Crafted from duplex stainless steel and designed for durability, the quality of these cylinders is outstanding. Packed with features, easy to install, and able to be connected to solar or heat pump installations, they are our premium hot water cylinder.

Peace of mind

  • Our range of stainless steel mains pressure hot water cylinders comes with a long 10 year limited warranty on the cylinder*. It's backed by Rinnai after sales support and like all our cylinders they are NZ designed and engineered.

Future proof your home

  • Connect to a hot water heat pump or solar system with the extra eco inlet connection** now or in the future.
  • Install as a low pressure system then connect, without replacing your cylinder, to the luxury of mains pressure when you are ready.

Energy efficient

  • Curved element design ensures 98% of the water is heated
  • Cold water inlet tubes deliver water to the bottom of the cylinder to avoid mixing water
  • No cylinder wraps required, all Rinnai cylinders meet the NZ Minimum Energy Performance Standard (MEPs)


  • Lightweight, stainless steel makes transport and installation a breeze
  • Low maintenance, no sacrificial anode to maintain

Innovative design

  • The 250 and 300 L cylinders have the option of a second element making recovery times quicker and making it less likely you'll run out of water.

Suitable for:

  • Indoor installations
  • Mains and low pressure systems
  • Domestic and commercial water heating applications
  • Left or right hand plumbing connections
  • Connection to open loop solar or hot water heat pump systems
  • Not suitable as a pool or spa heater.

Water quality

  • Rinnai water heaters are manufactured to suit most New Zealand council water supplies. However some water supplies can have a detrimental effect on the water heater, its operation and life expectancy.
  • Water supplies with a high level of calcium carbonate (hard water) can cause scaling on hot surfaces. We recommend a water temperature of no more than 65°C to minimise scale build-up. Scale reducing or water softening devices should be considered in hard water areas. The unit is not guaranteed against damage due to scaling.


  • Smart cylinder option also available - see related products
  • Please contact your store to discuss the following options:
    • Second elements to make recovery times quicker and making it less likely you'll run out of water
    • Auto reset thermostat option so that cylinders can be solar or hot water heat pump ready
    • Other size variations.

* Please see the owner and installer guide for full warranty details
** Excludes the 135 L cylinder

Owner and Installer Guide Download
Supplier Declaration and Product Approval Download