Osmio MaxiSoft Non-Salt Softener 1" BSPP Female - 90 LPM


The Osmio MiniSOFT is a smart and environmentally friendly whole house limescale control

Smart & Environmentally Friendly Whole House Limescale Control. Protect your home from limescale and corrosion internally, inside pipes and boilers. It makes cleaning easier. Limescale residues wipe off easier of dried surfaces. Compact, easy to fit (no bypass needed), and simple media change every 80,000 litres. Simple, environmentally friendly, and economical.

This product uses polyphosphate which is proportionally dosed into the water at 5ppm (or 5 mg/l). It cannot over-dose the water so the level is always between 3-5ppm.

Polyphosphate is a food grade, non-toxic substance that is used widely in coffee machine filters, jug filters and has a long-established record of being safe to use and drink. Therefore, this product can be installed at the entry point of a property and serve the entire building.

This new technology is better than alternative solutions such as salt-based softeners, which are the most heavyweight, expensive, and environmentally damaging and are not an option if you have no sewerage services and your own septic tank. Salty water down the drain is an environmental disaster, especially for waste water treatment.


The Osmio MaxiSOFT is suitable for houses with more than 2 bathrooms, and up to 5 bathrooms. Each filter lasts for approximately 80,000 litres and is available to order as a pack of six refills. In a house with two adults, 6 refills last around 400 days.

Key Benefits

  • Easy to fit and low cost
  • Easy shut off for simple media replacement
  • Avoid the formation of calcium bicarbonate preventing incrustations in pipes and heating systems
  • Create a film inside the plumbing system which protects pipes from corrosion
  • Environmentally friendly alternative to salt softeners that actually really works

How it works

The Osmio MaxiSOFT works by proportionally dosing the water with 3-5 ppm of polyphosphate. Polyphosphates are food grade and non toxic and used in jug and coffee filters. The system can be fitted to the entry point of a property without the need for a separate bypass to the kitchen tap (i.e. it is drinkable). The media replacement is quick and easy and lasts up to 80,000 litres.

What it does compared to salt softeners

Salt based softeners actually take out the minerals and add in around 150 mg/l of sodium carbonate (not drinkable). This produces a lather effect with soap and the salt you add into it is used to backwash the resin in the tank. This flushes salty water down the drain which is an environmental problem and is not suitable for homes with septic tanks. Installation must involve a bypass to the kitchen cold tap comply with WRAS Regs.

The Osmio MiniSOFT gets even better results than a salt softener when you consider only its “internal” effect. This is where the water cannot dry and therefore the material contact is protected from the formation of scale and corrosion which is where all the expensive plumbing problems happen. The Osmio MaxiSOFT does not remove the need for cleaning off the appearance of limescale nor does it affect how soap lathers. It just makes the appearance of limescale which is less prone to forming and mineral residues less do not stick as much once the water has dried on a surface, making it easier to wipe off.

Please note this product does NOT come supplied with any media to fill it with. Please add the MaxiSOFT Refill to your order if you are newly purchasing the system. 

Supplied with 2 x connectors

Technical Data

Connectors Diameter 3/4 " and 1" female


  • Height 210 mm
  • Width 90 mm
  • Depth 140 mm

Dosing 4-5 ppm

  • 100% effective up to 350 ppm CaCO3 (Calcium Carbonate)
  • Max Pressure 12 bar
  • Flow Rate 5.8 mc/h
  • Pressure drop 0.075 bar
  • Incoming water temperature 5 - 40 °C
  • Polyphosphate media is 100% effective in stored water up to 70 °C


  • Body Brass T58
  • Bowl Grilamid
  • Soffietto Silicon
  • Doser weight 2.70 Kg
  • Polyphosphate weight 200 gr
  • Treated water 60 mc ca

Warranty & Aftercare

This product comes with a warranty. Terms apply. Please see the downloadable manual for warranty terms.

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