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PRESSURE BALANCING
Pressure balancing when the feed water pressure is different between hot and cold feeds.
The thermostatic mixer valve is designed to work best when the feed pressures of both hot and
cold water are the same. If there is a difference in pressure it will cause the flow of water through
the valve to pulse rather than being a steady flow. This pulsing can be reduced by putting one
of the metal disks with holes (Fig1-3) into the higher pressure feed to the valve. This restricts
the flow and reduces the pulsing).(Fig 4.) Indicates how to locate and position metal disc. This
restricts the flow and reduces the pulsing).
To maximise the volume of water through the valve the disk with the most holes should be tried
first. If this does not work the others should be tried until a satisfactory result is obtained.
If the water pressures to hot and cold are the same these disks do not need to be used.
NOTE: Do not adjust the centre threaded screw as this is factory set.
FITTING OF THE MIXER VALVE
1.
A rectangular hole between approximately 210mm and 110mm should be large enough
to fit the mixer valve. The valve should be fixed to the wall between 75mm and 90mm
below the finished surface of the shower (See Fig 5).
2.
The supply pipework can be plumbed from above or below but must finish at the
suitable connections which should be at approximately 150mm centers (See Fig 6),
provision should be made for some adjustment on fitting the valve.
3.
Fit a male ¾ BSP elbow to 15mm or 22mm compression (not supplied) to both hot
and cold inlets and the outlets, apply PTFE tape to seal the threads.
NOTE: It is recommended to apply PTFE tape to all threaded connections (boss white or
other sealing compounds are not suitable).
The valve can be used either as a 2 way or a 3 way valve depending on the users
preference, and a blanking nut is provided to blank off one outlet when being used as
a 2 way valve. When using as a 3 way valve, the third outlet may be used for other
accessories which are not supplied.
You should measure the distance between the outlets on the mixer valve you are
fitting to determine the exact distance.
4.
At this point you may wish to fit the pipework and the wall arm (See wall arm fitting and
wall outlet) prior to any tiling.
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