Stainless Steel Mains Pressure Indoor Cylinders
Easy to install, and able to be connected to solar or heat pump installations, they are our premium hot water cylinder
Constructed from high grade duplex stainless steel and packed with features to benefit specifiers, installers and homeowners, making them exceptional value for money.
- Lightweight, stainless steel makes transport and installation a breeze
- Low maintenance, no sacrificial anode to maintain
- Auto-reset thermostat option means these cylinders can be solar or hot water heat pump ready
The 250 L 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.
Install as a low pressure system then connect, without replacing your cylinder, to the luxury of mains pressure when you are ready.
Product Details
Suitable for:
- indoor installations only (diam. 550 mm)
- residential 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 cylinders are manufactured to suit most NZ council water supplies. However some supplies can have a detrimental effect on the cylinder, its operation and life expectancy. Stainless steel cylinders are not suitable for bore or tank water.
Water supplies with a high level of calcium carbonate (hard water) can cause scaling on hot surfaces. We recommend a temperature of no more than 65 °C to minimise scale buildup. Scale reducing or water softening devices should be considered in hard water areas. The unit is not guaranteed against damage due to scaling.
Technical Specifications
550 mm
Not required
Hot and cold water connections ¾ ” (20 mm)
Inner cylinder: High grade duplex stainless steel
Outer casing: Galvanised steel
Incoloy 825 alloy sheath element positioned at the bottom of the tank.
850 kPa
To 15 bar
CFC-free polyurethane foam, compliant with MEPS standard
Robert Shaw 30 A contact thermostat, manually resettable at 85 °C. Thermostat can be upgraded to an auto-reset thermostat for solar and hot water heat pump applications.
Rating of TPR supplied with cylinder— factory set to 850 kPa and 90 °C.
135 L = 29 kg
180 L = 35 kg
250 L = 45 kg
300 L = 53 kg
Based on a thermostat temp. setting of 60 °C and an incoming water temp. of 15 °C.
- 135 L = 3 hrs 56 mins (2 kW), 2 hrs 37 mins (3 kW)
- 180 L = 5 hrs 15 mins (2 kW), 3 hrs 30 mins (3 kW)
- 250 L = 7 hrs 17 mins (2 kW), 4 hrs 51 mins (3 kW)
- 250 L = 3 hrs 39 mins (2 x 2 kW), 2 hrs 25 mins (2 x 3 kW)
- 300 L = 8 hrs 45 mins (2 kW), 5 hrs 50 mins (3 kW)
- 300 L = 4 hrs 22 mins (2 x 2 kW), 2 hrs 55 mins (2 x 3 kW)
No cylinder wrap required. All Rinnai cylinders meet the NZ Minimum Energy Performance Standard (MEPS).
Late 2017
- MS13555020 135 L 2 kW (height 1020 mm)
- MS13555030 135 L 3 kW (height 1020 mm)
- MS18055020 180 L 2 kW (height 1295 mm)
- MS18055030 180 L 3 kW (height 1295 mm)
- MS25055020 250 L 2 kW (height 1730 mm)
- MS25055030 250 L 3 kW (height 1730 mm)
- MS30055020 300 L 2 kW (height 2045 mm)
- MS30055030 300 L 3 kW (height 2045 mm)
- MS250550D20 250 L 2 x 2 kW (height 1730 mm)
- MS250550D30 250 L 2 x 3 kW (height 1730 mm)
- MS300550D20 300 L 2 x 2 kW (height 2045 mm)
- MS300550D30 300 L 2 x 3 kW (height 2045 mm)
- MS250550U20 250 L 2 kW (height 1730 mm)
- MS250550U30 250 L 3 kW (height 1730 mm)
- MS300550U20 300 L 2 kW (height 2045 mm)
- MS300550U30 300 L 3 kW (height 2045 mm)
- MS18055020A 180 L 2 kW (height 1295 mm)
- MS18055030A 180 L 3 kW (height 1295 mm)
- MS25055020A 250 L 2 kW (height 1730 mm)
- MS25055030A 250 L 3 kW (height 1730 mm)
- MS30055020A 300 L 2 kW (height 2045 mm)
- MS30055030A 300 L 3 kW (height 2045 mm)
- MS250550D20A 250 L 2 x 2 kW (height 1730 mm)
- MS250550D30A 250 L 2 x 3 kW (height 1730 mm)
- MS300550D20A 300 L 2 x 2 kW (height 2045 mm)
- MS300550D30A 300 L 2 x 3 kW (height 2045 mm)
- MS250550U20A 250 L 2 kW (height 1730 mm)
- MS250550U30A 250 L 3 kW (height 1730 mm)
- MS300550U20A 300 L 2 kW (height 2045 mm)
- MS300550U30A 300 L 3 kW (height 2045 mm)