Posted July 30th, 2017



Siliphos is a milk thistle extract. It is made of 100% food grade materials.

Siliphos prevents scale formation and stops corrosion of pipes. After months of use, it can actually slowly remove some of the existing scale from pipes and appliances.

Siliphos acts as a sequestering agent, coating the inside of pipes and making a thin protective layer on metal surfaces to prevent scaling, corrosion and brown or red water.

Siliphos does not alter the taste of the water. It dissolves slowly into the water and acts by preventing the adhesion of minerals to metallic surfaces.

It can be added as an inexpensive whole house or point of use treatment. Siliphos spheres can be inserted into the center core of carbon block or sediment filters or dispensed through a separate filter housing installed in the water line. The larger system with separate housing lasts longer and supports higher flow rates. There is little pressure drop across Siliphos units as compared with most media filters.

Unlike conventional water softeners, Siliphos is inexpensive, easy to install, does not use salt or electricity, and does not add sodium to water. Siliphos costs considerably less than TAC softener alternatives. 


Basic Stand-Alone Siliphos Units from Pure Water Products


Unit Description Home Size Cartridge Size  Ballpark Price. Unit with one Cartridge.
Compact Unit with Clear Housing. Installs on 3/4″ pipe. Cartridge holds 100 siliphos spheres. One or two people. 9.75″ X 2.5″ $130
Standard Unit with Blue Housing, for 3/4″ or 1″ Pipe.  Cartridge holds 200 siliphos spheres. Two to Six People 9.75″ X 4.5″ $180
Large Unit with Blue Housing for 1″ or 1.5″ Pipe. Cartridge holds 250 siliphos spheres. Six people or more 20″ X 4.5″ $270

All units have replaceable cartridges. Ballpark prices for the replacement cartridges are $40 (9.75″ X 2.5″), $90 (9.75″ X 4.5″), and $115 (20″ X 4.5″).

Please call 888 382 3814 for exact pricing of Siliphos units or to order.


Mid-Sized Siliphos Unit, uses 4.5″ X 9.75″ replaceable (or refillable) filter cartridge with 200 Siliphos spheres.