H2O US3 High Capacity Undercounter Water Purifier


High capacity Under-sink Water Purifier.

SKU: US3 Category:


The US3 is installed Undercounter in the kitchen with a dedicated separate filter tap. This popular water purifier fits neatly under the sink and requires minimal space. The US3 is an upflow system with 1/4″ push-fit fittings for ease of install and cartridge replacement at end of life. Available as cartridge only for those with existing filter taps who wish to upgrade to a higher capacity, better value for money water purification system. Alternatively, the system can be purchased with full tap and fittings kit too.

A pressure limiting valve (PLV) is now included to protect the cartridge from pressure spikes and to limit the flow rate through the filter. Flow rate will be limited to recommended tolerances and must be installed on the inlet side of the filter.

All warranties are void if PLV is not installed.

Full installation guide is included.

The unique 6-stage purification process provides longer contact time for maximum removal of bacteria, additives and contaminants. The Silver-impregnated Granulated Activated carbon can treat up to 85,000 litres of water with minimal maintenance – cartridges are changed every 24-36 months. See “WHY H2O” section of the website for media breakdown and list of chemicals and contaminants removed.

The design and amount of media allow flow rates up to 3.8 lt/min, which saves time without reducing water quality.

This purifier performs best with municipal water. If you have a private water supply or water with high levels of sediment, please contact our team to discuss the best option prior to completing your order.

Valve option:

H2O Filter

Brass Valve

H2O quarter-inch-valve-for-US3

FPV 1/4 Inch Valve


FPV 3/8 Inch Valve



Suitable for:

  • Under counter system for use with filter tap – separate filter faucet.
  • Easily adapts to Tri Flow and 3-Way filter taps.
  • High flow rate
  • High capacity
  • Popular for large families
  • DIY installation
  • Simple to maintain
  • Bacteriostatic – kills bacteria found in water whilst also prevents bacteria growth within filter.
  • Improves taste by way of pH enhancement.
  • Eliminates bad odours
  • Removes hundreds of chemicals and contaminants.
  • Recommended flow: 3.8 L/min
  • Maximum Expected Capacity: 83,000 litres
  • Fittings: 1/4″ push-fit 
  • Longevity: Up to 36 mths
  • Sealed construction
  • Sediment pre-filter included
  • 6 Stage filtration & purification
  • Laboratory tested
  • 3 year warranty
  • Height 41.9cm
  • Width 10.2cm
  • Shipping weight: 3.6kg
  • Large families
  • Home owners
  • B&Bs & Guest Houses
  • Offices
  • Best quality water
  • Best value for money

Not suitable for:

  • Removal of salt
  • Replacing Reverse Osmosis

Additional information



Choose Tap:

None, Puro Standard, Cigno Deluxe, Dante 3-way, Valentino 3-way, Cascata 3-way


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