7
There are several types of plumbing systems in common use:
a) Static Head
These systems are fitted with storage tanks. The water softener can be installed using the
standard 15mm or 22mm installation kit supplied with your water softener.
b) Systems using combination boilers (15mm)
For these systems, we recommend that your water softener be “hard plumbed” using
copper tubes or flexible high flow braided hoses.
c) Unvented fully pressurised systems (22mm)
As for combination boilers above.
The water softener should be installed within a container with no less than 100 litre
capacity, to which there should be connected an overflow pipe of no less than 20mm
diameter. The overflow should be connected at the bottom of the container and not less
than 150mm below the height of any electrical components mounted on the water
softener. It is recommended that an anti-vacuum valve be fitted to the inlet pipework
supplying the water softener.
3. Loft installation
If you are planning to install the water softener above ground level e.g. In the loft,
the following instructions should be strictly adhered to.
4. Plumbing systems
5. Backflow prevention device
Your water softener installation must include at least one drinking water tap that is not
fed by the water softener.
It is recommended that individuals on a low sodium diet should follow the Department of
Health's advice that water from a domestic water softener should not be used for
drinking or cooking. Softened water contains a small amount of sodium. It has been
calculated that 1 pint of softened water contains a similar amount of sodium as two slices
of white bread or ¼ pint of milk.
Water that is used for mixing powdered milk for babies must only be taken from an un-
softened mains tap as some powdered milks and softened water both contain sodium for
which young babies have a limited tolerance.
6. Drinking water
P RA T ENO
When fitted to the supply feeding a single dwelling, a check valve complying with BS6282
Part 1 must be fitted on the cold water feed prior to the installation. All other types of
installation require the fitting of a double check valve.
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