One Stop Plus™ 20″ x 4.5″ Scale Reduction Water Filter Cartridge


20″ x 4.5″ filter cartridge for scale and heavy metal reduction. Protects water-consuming appliances and reduces scale without removing beneficial minerals.


20″ x 4.5″ One Stop Plus™ Scale and Heavy metal Reducing Filter.

One Stop Plus™ is a revolutionary new product which reduces scale and heavy metals at high flow rates.

It limits scale build-up by transforming dissolved calcium carbonate molecules into harmless soft crystals which cannot solidify on hard surfaces.

Heavy metals including copper, lead, zinc and cadmium are also reduced as they are adsorbed by the One Stop Plus™ media.

This cartridge is ideal for use in a Point of Entry Whole House Water Filter System, in conjunction with sediment and chemical filter cartridges.

It can also be used to protect valuable water consuming appliances, like hot water systems, saunas, hot tubs, washing machines and dishwashers.

The perfect solution for parts of Australia with hard water, like South Australia, Western Australia, and Queensland.

Unlike traditional water softeners which use ion exchange resin, One Stop Plus™ does not need to be back-flushed with salt. This means you never have to drink salty-tasting drinking water.

One Stop Plus™ also doesn’t require electricity, doesn’t contain any harmful chemicals, and can be installed in a standard 20″ x 4.5″ filter housing.

The One Stop Plus™ 20″ x 4.5″ cartridge has a lifespan of between 12 to 36 months, depending on the level of heavy metals in the water (high levels deplete the media faster). This makes it a very cost effective solution for scale reduction.

Continue reading to learn more or give us a call to discuss the suitability of this product for you.

One Stop Plus™ Key Features

  • Scale Reduction At High Flow Rates
    20″ x 4.5″ One Stop Plus™ Scale Reduction Filter is most effective at flow rates up to 15 litres per minute and partially effective past this point. This makes it ideal for Whole House Filter Systems and Point of Use systems which protect water consuming appliances.
  • Heavy Metal Reduction
    One Stop Plus™ can also reduce copper, lead, zinc, cadmium, and other heavy metals.
  • Environmentally Friendly
    Reduces limescale without the use of chemicals, electricity or salt, making it an environmentally water filtration option. 
  • Retains Essential Minerals
     Traditional softeners strip out most of the mineral content in the water.  One Stop Plus™ retains these healthy minerals, making your water healthier to consume.
  • Protects Appliances and Improves Their Efficiency 
    Reducing scale build-up will protect your water consuming appliances and improve efficiency, which will can save you money on energy costs.  It will protect many types of appliances including Coffee Machines, Hot Drink Machines, Water Heaters,  Boilers, Liquid Circuit Cooling Systems, Washing Machines, and Heating Systems.
  • Removes Existing Limescale
    After installing a One Stop Plus™ filter, it will begin to strip away any scale that is already present on your water lines and inside of appliances. A great way to fix a pre-existing scale problem.
  • Long Cartridge Life
    Hardness is not the limiting factor in determining cartridge lifespan — heavy metal content is. If you have very low levels of heavy metals in your water, the cartridge may remain effective at reducing scale for 2 or 3 years.
  • Doesn’t Require Electricity or Salt
    Unlike traditional water softeners, One Stop Plus™ does not require any electricity or salt. This makes installation much easier and avoids any negative changes to your water quality.

One Stop Plus™ – How It Works

One Stop Plus™ is designed to protect piping and water consuming appliances from limescale deposits.

It can be installed in a Point of Entry system, which protects your entire home from scale build-up, or as a Point-of-Use unit directly installed before water-consuming appliances like coffee machines, dishwashers, hot water systems, hot tubs, and washing machines.

The media works by interacting with incoming calcium carbonate molecules which are dissolved in the water.

It converts the molecules into a harmless soft crystal which won’t harden to form scale. The crystals don’t change the flavour or appearance of the water in any way and will harmlessly flow through appliances.

As an added benefit, the crystals will attract free calcium carbonate molecules, stripping away any existing limescale deposits on hard surfaces.

Unlike resin systems, the water treated by OneStop Plus™ will retain the healthful minerals found in your drinking water, while solving limescale problems.

One Stop Plus™ – Applications

OneStop Plus™ cartridges can be used in both commercial and domestic operating environments. They can be used as a Point-of-Entry solution or a Point-of-Use solution.  Ideal for protecting:

  • Espresso Coffee Machines
  • Hot Water Systems
  • Heating Systems
  • Washing Machines
  • Baths, Showers, and Sinks
  • Hot Drink Machines
  • Boilers or Steamers
  • Liquid Circuit Cooling Systems

One Stop Plus™ – Water Chemistry Limits

The OneStop Plus™ system is a finished product, ready to be installed and used. It will need a standard 20″ x 4.5″ Big Blue or Big White Housing to work. However, pre-filtration may be required if your water falls outside of the parameters listed below:

  • pH: 6.5 ~ 8.5
  • Maximum hardness: 1300 ppm
  • Temperature: 5°C ~ 60°C
  • Chlorine: <3 ppm
  • Iron: <0.3 mg/l
  • Manganese: <0.05 mg/l
  • Oil and polyphosphates: Treat before OneStop™
  • Hydrogen Sulfide: Treat before OneStop™

One Stop Plus™ – Process


Download OneStop Plus™ Brochure


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