A WK is fitted on the cold down service to the heater with anothr WKy on the secondary return. A third WK boosts the treatment on the cold water services to the showers and blending valves.

Unvented System with Calorifier

A WK is fitted to the common cold services as close as possible to the calorifier. A second WK is fitted to the hot water secondary return (HWSR).

Cold Water Storage Tank with Booster Set

A WK is fitted to the common boosted cold water service afterf the booster set. A second WK is fitted to the HWSR.

Offices and dwellings with point-of-use or local Electric Water Heaters

We recommend that each heater is treated with a dedicated unit such as the Sentry. This overcomes the problem of the long delay that can arise between the time that water is treated at the point of entry and actually being drawn off from a water heater. All the time that it dwells in the heater, it is being treated by the signal from the WK.