H2O US4-13 (NSA 100SX) Water Purifier


Official NSA 100SX replacement cartridge – 10mm or 3/8″


The US4-13 is the official replacement for the NSA 100SX systems sold many years ago in the UK and Europe. Fully compatible in terms of size and flow rates. Easy to install undercounter to an existing separate filter tap, or adapt to any 3-Way kitchen tap. Sold as replacement cartridge only – but tap and kit can be added separately. Compact with improved flow rates due to upflow 3/8″ push-fit fittings. 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 provided. Cartridge with 10mm Push Fit or Compression fittings available on request.

The unique 6-stage media bed provides great tasting, pH enhanced drinking water for healthier consumption. More cost effective than bottled water and better for the environment too due to no plastic going to waste/ landfill. Filter cartridge only needs changing every 36 months. See “WHY H2O” section of website for media bed breakdown and list of additives removed.

The design and amount of media allow flow rates up to 5 litres/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:

  • Direct replacement and compatible system for NSA100 market
  • Can be compactly stored and installed under any kitchen sink.
  • High flow rate
  • High capacity
  • Popular for large families
  • DIY installation
  • Simple to maintain
  • Great value for money
  • Bacteriostatic – Kills certain water borne bacteria and prevents bacteria growth within filter
  • Patented media Riolyte enhances pH levels and improves taste.
  • Eliminates bad odours
  • Removes hundreds of chemicals, additives and contaminants
  • Recommended flow: Up to 5Litres/min
  • Maximum Expected Capacity:94 600lt
  • Fittings: 3/8″ push-fit fittings. 10mm available on request
  • Average Longevity: 24 – 36 months
  • Sealed construction
  • Sediment pre-filter optional
  • 6 Stage filtration & purification
  • Laboratory tested
  • 3 year warranty
  • Height 35.6cm
  • Width 12.7cm
  • Shipping weight: 3.7kg
  • Large families
  • Home owners
  • B&Bs & Guest Houses
  • Offices
  • High flow rates
  • High flow rate requirements
  • Best quality water
  • Best value

Not suitable for:

  • Removal of salty tastes

Additional information



Choose Tap:

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


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