Wholly manufactured in externally/internally polished stainless steel, they result to be resistant to wear and to mechanical stresses generally speaking, unattachable by sediments, being all the parts in contact with water smooth and without porosity, particularly suitable to the treatment of primary waters.

The GEM Series is suitable for any standard passing hole DOE cartridges (not included). This series has been created for cartridges numbered between 3 and 40.