HydroBlend - the Proven SolutionSoutheastern Filtration & Equipment Systems (SFES) manufactures HydroBlend® systems containing an NSF certified drinking water additive* that effectively controls mineral scale deposits in plumbing systems and water-fed equipment. Unlike standard polyphosphates, HydroBlend is specifically formulated to work in high-temperature / high-hardness environments providing unparalleled mineral scale prevention and corrosion control.

* Please contact SFES for further information on NSF listings.

HydroBlend protects equipment by the following processes:

  1. HydroBlend sequesters (binds) with scale-causing minerals making them more soluble in water thus reducing the chances of precipitation as hard mineral scale.
  2. In the event that scale causing minerals do precipitate out of solution, HydroBlend prevents mineral scale accumulation by distorting the shape of the scale crystal so that it cannot build up on itself.
  3. By combining with scale-causing minerals, HydroBlend provides corrosion control by forming a protective micro-thin glass-like lining on wetted surfaces acting as a deterrent to corrosion and scale.
  4. Overtime, HydroBlend will also help soften and remove existing mineral scale deposits.


HydroBlend is utilized in a solid block cartridge form, exposing to the water a predetermined fixed surface area, from which accurate feed rates can be predicted. HydroBlend systems consist of Media Delivery Heads (Flow-Thru or Standard Filter heads) that are paired with various cartridge designs based on water flow rates, line size, and other usage characteristics. Unlike standard polyphosphate treatment, HydroBlend Systems allow various configurations to meet most treatment requirements with the goal of obtaining proper feed rates for desired treatment volumes.

HydroBlend Systems provide effective scale prevention and corrosion control for various applications at a fraction of the cost and maintenance of other technologies. As a ‘threshold treatment”, HydroBlend Systems are specified based on water usage and flow rates, not water hardness, so there is no added expense with harder water. When the cartridge has dissolved, it is replaced. A quick glance at the clear or translucent housing indicates when cartridge replacement is needed – no electricity, drain lines, maintenance or guess work is required.


Polyphosphates have been used in the prevention of mineral scale and corrosion control for many decades, mostly in municipal systems to protect water distribution lines. Although they work in a similar fashion to the HydroBlend product, they are not as effective in high hardness applications, and exhibit no effectiveness in high temperature processes.

Glassy Phosphates – are generally used in the form of crystal products such as the hexametaphosphate crystals, and while they may exhibit some effectiveness at low temperatures in water conditions that are not hard, they fail to provide scale control when temperatures exceed 90°F. This was first noted in the 1945 patent filed by Charles S. King describing the crystal. He states that the crystals totally revert when temperatures exceed 90° F which explains the poor results that are obtained in using these products in hot water applications.

Siliphos – is a polyphosphate based product where silica is used as a caking agent in order to regulate the rate at which the product is dissolved into the water stream. Similar to standard polyphosphates, Siliphos looses its effectiveness in high hardness and high temperature applications. The silica that is used in the product may also leave a silica scale deposits in certain equipment processes.

Method of Dispensing – The ways that polyphosphates are added into the water supply will vary according to the type of product used. Hexametphosphate crystals and Siliphos are usually added into prefilter housing sumps and are dissolved as water comes in contact. The main problem with this type of design is the lack of consistent feed rates. It is also difficult to predict the dissolution rates and the amount of polyphosphate present in the water stream at any given time. Siliphos addresses this concern by combining polyphosphate with silica (used as a caking agent) to control the dissolution rate. However, since silica is not completely soluble in water, a sludge will tend to form of undissolved silica which causes problems in certain water fed equipment.


Standard Polyphosphates are ineffective in hot water applications.
No accurate feed rates unless electric feed pump is used.
Dumping when water sits overnight.


HydroBlend products are specifically designed to provide mineral scale prevention and corrosion control in high temperature and high hardness applications.
All the ingredients used in HydroBlend are 100% active, so there is no residual product left in equipment processes.
HydroBlend feed systems also ensure that the product feed rate is consistent over predictable time periods.
HydroBlend products are available in various configurations allowing it application to many different processes.
There is no dumping when the product sits overnight.
No electricity, drain, or guess work is required. A quick glance at the clear housing will indicate when cartridge replacement is needed.

Southeastern Filtration & Equipment Systems • 158 Railroad Street • Canton, GA 30114 • (770) 720-2800 • US (800) 935-8500

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