Location of Water-King Units

Domestic Plumbing Systems

In most homes, a single Water-King installed on the rising main will provide adequate scale protection and softer water.
Unvented Water Systems

When a combi boiler is used, and there is no hot water cylinder, a single Water-King unit fitted on the rising main will provide whole house protection. (See Fig 1). If only the boiler needs protection from scale, locate the Water-King within 2 metres of it. This also applies to a hot water cylinder under mains pressure. Only the cold supply pipe should be treated.

Vented Hot Water Systems With A Cold Water Header Tank

Treated water delivered to a cold water storage tank will lose the effect of the treatment; depending on water quality, this can happen very quickly. For this reason cold water is best treated after a storage tank.

For best results we recommend two Water-King units are fitted; one on the main inlet to the house (rising main) and one on the cold pipe that runs from the cold storage tank into the bottom of the hot cylinder (cold down service). (see Fig 2)

If you decide to fit only a single unit, then you will get best value from it by fitting it on the cold down service. The signal is transmitted through the water and will treat all the water in the storage tank. If you have copper pipes that are cross bonded to the rising main, the taps fed from it should be adequately treated as well.

A single unit fitted on a copper rising main can give a satisfactory result.

Central Heating Systems

The central heating system operates on a closed circuit and should not normally suffer from scaling. It does not need a separate unit but will benefit from signal transfer at the heat exchanger.

Larger Domestic, Commercial and Industrial Applications

Water-King electronic water softeners (up to 159mm) are suitable for a wide variety of commercial and industrial applications. Please go to our commercial section of this site.