Opticalc

Salt-free and efficient protection against limescale and corrosion. The best polyphosphate dosing device on the market, from GWP.

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Optifiltrex

Optimum protection against harmful dirt particles, such as grains of sand and rust particles. A water filter like no other, from GWP

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Extend your GWP product guarantee period to 10 years here.




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"I am very pleased with the duo system! I will be installing your Opticalc and Optifiltrex again in my new home,
no doubt about it." 

- M., a satisfied customer

Choose optimum protection against limescale and corrosion

Discover the key benefits of OPTICALC

Protects and restores

Opticalc offers protection against both limescale and corrosion. Not only that, it causes the existing limescale to gradually dissolve.

User-friendly, maintenance-free  

A unique audible warning automatically tells you when the cartridge is almost empty.Thanks to the built-in bypass, you can replace the compact cartridges in 3 simple steps, without interrupting the water flow and getting your feet wet.

No electricity or drainage required 

Opticalc uses water power, so no batteries or electricity are required. In addition, there is no need for regeneration, dispensing with the need to drain off water unnecessarily. 

Compact shape

Both the casing and the cartridges are compact and lightweight. This makes our products ideal for hard-to-reach places or small (technical access) spaces. 

Easy installation

Installation is a breeze thanks to its compact shape, low weight, 360° rotating connection, and built-in bypass. 


Healthy and safe  

Opticalc uses food-grade phosphate minerals, which means they are 100% safe, as well as being completely odourless and tasteless. Unlike conventional water softeners, Opticalc does not remove important minerals such as calcium and magnesium from the water.

How does the Opticalc work?

Precise dosing.

The unique dosing system in the Opticalc cartridge allows a controlled and precise phosphate dose of 3 mg/l (on average) to be added to the water. The added phosphate minerals will naturally bind with the calcium and magnesium minerals present to stop them from developing into calcium crystals when heated. This prevents harmful calcium deposits.

Extra protection against corrosion

These phosphate minerals also offer ideal protection against corrosion. The minerals form a thin protective film along the inside of water pipes and boilers, and on heating elements. This protective layer prevents corrosion from occurring and therefore possible lead contamination.

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Need new cartridges?

Order quickly and easily online. 

Choose optimum protection against limescale and corrosion

Discover the key benefits of OPTIFILTREX

Protects 

Optifiltrex provides protection from suspended dirt particles, such as grains of sand, rust particles and flakes. 


Self-cleaning

The rotating flow, RotaFLUX, prevents dirt particles from attaching to the rust-free filter, allowing them to sink to the bottom of the housing. Here, they are easily removed using the purge plug.

User-friendly

Thanks to the built-in bypass, you can replace the compact filter cartridges in 3 simple steps, without interrupting the water flow and getting your feet wet. 

Compact shape

Both the casing and the cartridges are compact and lightweight. This makes our products ideal for hard-to-reach places or small (technical access) spaces. 

Easy installation

Installation is a breeze thanks to its compact shape, low weight, 360° rotating connection, and built-in bypass. 


Healthy and safe

Optifiltrex is healthy and safe because it uses surface filtration, which is much healthier than the depth filtration of the conventional filter candles, which harbour bacteria. 

How does the Optifiltrex work?

Rust-proof filter cartridge

The rust-proof filter cartridge in this water filter forms a kind of physical barrier to prevent the accumulation of microscopic dirt particles - such as grains of sand, rust particles, and flakes.

RotaFLUX

The powerful rotating flow (RotaFLUX) prevents these dirt particles from attaching to the filter, which prevents clogging. The dirt particles are easy to remove using the purge plug or a tap. . 


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Duo protection

Combine Opticalc & Optifiltrex and enjoy optimum protection. Always install the Optifiltrex upstream of the Opticalc and enjoy even better protection for your plumbing fittings and pipes. Our filter removes suspended dirt particles from the water while the Opticalc eliminates limescale and corrosion.


Where can I find these products?