Scale Reducers

In certain regions town supplies or bore water will contain different concentrations of mineral substances causing scale formation.

The presence of scale in water  does not affect health.  However, a too high concentration (calcium hardness / hard water) can  result in obstructed pipes and the deterioration of household appliances and sanitary installations.

The PUGH scale reducer doses a small quantity of food phosphate into the water supply without modifying its calcium and magnesium content. This active ingredient in the scale reducer  works  as a crystallisation or corrosion inhibitor. The content of phosphate left in the water is negligible in comparison with the concentration in daily food preparations. After treatment by the scale reducer, the water can be heated up to 85°C without causing formation of hard scale.

This process has no influence on taste or odour of the water.

NEW 2018



* Single cartridge

* Capacity 250 L/day

* Connections 3/4" Female

* Made entirely from brass

* Servicing requires replacement of the cartridge every 6 months


* Dual cartridge

* Capacity 500 L/day

* Connections 3/4" Female

* Made entirely from brass

* Servicing requires replacement of both cartridges every 6 months


• 1x Adjustable mounting bracket in stainless steel
• 1x Ball valve with integrated check valve (inlet)
• 1x Check valve (outlet) approved NF 
• 2x Connections and brass ring nuts (to fix the bracket)
• 2x Connections 3/4''MM (to fix the scale reducer model 75 or 150B)
• 2x Stainless steel screws D.8mm, length 60mm
• 2x Washers
• 2x Universal plugs 10mm


Scale Reducer Cartridge



Scale is a deposit of mineral substances which forms when hard water is heated. These deposits form a very hard layer of scale which block pipes, storage vessels, etc.

The scale sticks on heated surface, it reduces heat transmission and increases the amount of energy (gas, electricity) necessary to heat water. This is a source of high maintenance and repair costs.

Scale reducers prevent scale formation by obstructing crystallisation in an adsorption process on the calcite lattice. After treatment the water can be heated up to 85°C without causing formation of hard scale. A sludge may form beyond 85°C and temperatures below 100°C. This sludge has no adhesion and is easily eliminated.


In areas where water is soft, steel and even galvanised steel appliances and pipes can be subject to corrosion causing pitting, clogging and staining on washing.

Scale reducers minimise the problems caused by corrosive elements in the water in contact with metallic surfaces.
The inhibition of the corrosive effects is obtained by formation of a thin protective layer of phosphate on the metal.

Does the active ingredient have any effect on health ?

The effect of the scale reducer is to add a few parts per million (mg/l) of complex phosphate to the water.
Numerous experiments have proved conclusively the non toxic properties of such phosphates which are used extensively in processed foods.

For example there are food preparations containing up to 3% (30g/kg) of phosphates.

In the human body the complex phosphates are rapidly broken down to orthophosphates. These phosphates are essential ingredients of the diet.

The contribution of phosphate to the diet from the scale reducer is negligible, particularly in comparison with other sources.

Is the scale reducer suitable for all types of installation ?

The scale reducer is fixed on the cold water supply line of systems equipped with steel, copper or plastic pipes.

Is it necessary to replace the cartridge after six months when is not completely exhausted ?

To maintain the efficiency of the scale reducer, the cartridges must be replaced after six months even if not completely exhausted.

After 6 months of use, the solubility of the active ingredient in the cartridge is decreasing.
The quantity which remains available is insufficient to ensure the minimum dosage required.

Will the scale reducer prevent scale depositing in the kettle ?

In the kettle, water is often heated near the boiling point. At 100°C the scale reducer cannot completely stabilise the hardness which causes scale formation. However experience shows that when a scale reducer is in use, there is less scale in the kettle.
Users of our products have also noticed that the scale which forms in the kettle is considerably less adherent and that it can be easily eliminated.

Our scale reducers are perfectly efficient for the protection of hot water distribution systems and appliances producing hot water in all cases where the temperature of the water is not exceeding 85°C.