Siliphos Polyphosphate 5kg

Siliphos Polyphosphate 5kg


SKU: FM-SIL5 Categories: ,



Siliphos is a scale inhibiting or sequestering agent in the form of soluble, sodium hexametaphosphate spheres.

The formation of scale on surfaces in potable water systems is due to the crystallization of carbonates or sulfates of magnesium or calcium from solution.

Siliphos works by releasing low levels of polyphosphates into the water which interfere with crystal growth, as well as by forming a protective layer of Iron-Calcium-Phosphates along the inner surfaces of pipes, water tanks, elements, etc. which deters the deposition and formation of scale.

Polyphosphates have also been found to not only inhibit scale formation but also help remove existing hard deposited carbonate or sulfate scale. Pipelines carrying potable water treated with polyphosphate for extended periods of time (several months) first show a gradual softening of the scale followed by disintegration and removal.

Siliphos is introduced into water systems via a treatment media filter housing that holds the spheres, which are slowly dissolved away as water flows over them.


Siliphos spheres have been shown to offer the following benefits in the treatment of potable and process water systems:

  • * Stabilize the hardness constituents in cold and hot water systems (up to 80ºC)
  • * Prevent precipitation/formation of scale on internal surfaces
  • * Sequester (isolate/hideaway) the heavy metal ions e.g. iron & manganese
  • * Minimise the occurrence of red water caused by dissolved iron
  • * Prevent pipe corrosion by forming a protective layer of phosphates
  • * Enable the gradual removal of existing scale

Hardness in water  (Calcium & Magnesium)

Degree of Hardness        Grains per Gallon (gpg) ppm (or mg/L)
Soft                                                        <1.0 <17.0
Slightly Hard                                            1.0-3.5 17.1-60
Moderately Hard                                      3.5-7.0 60-120
Hard                                                         7.0-10.5 120-180
Very Hard                                                >10.5  >180


Most natural waters cause damages in pipes, boilers and other installations. Some contain dissolved minerals, mainly calcium and magnesium salts. Such waters are referred to as being hard.

Hard Waters form scale in pipes and boilers. This leads to a decrease in water pressure and increased energy demand. Clogged pipes may have to be replaced. Heating coils may overheat and fail.

Soft Waters are aggressive to metals and cause corrosion. Consequently, the tap water turns brown. Leaks and burst pipes may be the results.
protects water systems in hotels, public buildings, private households and industry against scale formation and corrosion.
prevents so-called ‘brown’ or ‘red’ water and clogged pipes
saves expensive repairs or even replacement of water pipes, boilers, heaters, cooling systems etc.
help to save energy
extends the life of your water installation.

SILIPHOS prevents scale and stops corrosion. It utilizes the phenomenon that minute concentrations of polyphosphates are sufficient to inhibit the deposition of scale onto metallic surfaces. Because of its phosphate and silicate content SILIPHOS also inhibits corrosion by forming a thin protective layer on the metal surface. A SILIPHOS concentration of 2-3 ppm is sufficient to achieve both of these effects.

SILIPHOS will also slowly remove existing scale in old pipes if it consists of brown scale, i.e. ironoxide. Hard scale, i.e. calcium carbonate cannot so easily be removed by SILIPHOS. Here the advantage is again that SILIPHOS will prevent further scaling up. Experience shows that scale and corrosion is not only found in galvanized but also in copper pipes. Even in plastic pipes one can find scale and deposits.

As a rule of thumb one can say that 1 mm scale on the heating coils of a boiler, increases the energy cost by 15%. SILIPHOS consists of 100% active substancce. The use in tap water and other types of fresh water at the prescribed dosage is inoffensive.

Siliphos dispensers can be installed in almost every water system. They require no electric installation and hardly any maintenance. They only have to be refilled with spheres every 3 – 6 months. Refilling is very easy.

Antiscalant Ball


transparent ball

Phosphate as P2O5%


PH value



slowly soluble

Heavy metals as Pb %

0.001 max

Arsenic as As

0.0003 max

Fluoride as F

0.003 max

Application: widely used in pre-filtration for drinking water, boiler water and solar hot water systems etc to prevent the pipes forming scale.

Packing: cartons with plastic bags inside, 25kg net each.


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