The GRECH UV Light Steriliser has a unique design which feeds the water through a special helix, meaning the water does not just run through the UV but spins inside, allowing the UV more exposure before the water exits the outlet. This form of sterilising enables increased efficiency from a more-even exposure of the water to the UV.

This improved UV system, the Ultra Violet Clarifier, continues to be a key element of a well filtered clear water system.

The sterilizer is also supplied with a separate glass viewport which can be used to replace one of the hosetails for use as a one-in / one-out unit..