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).
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.
CONCENTRIC VALVE SET-UP
1.
Your thermostatic concentric mixer valve is set up in the factory so that a shower hose
can be fitted. This means that when the valve is fitted with the hot water coming in from
the left hand side, indicated by the red spot, the water outlet is on the bottom of the
valve and has a ½” BSP threaded male outlet (See Fig 4).
2.
Alternatively when fitting the overhead rail use an allen key:
a)
Remove the ½” outlet (See Fig 5)
b)
Remove the plug (See Fig 6)
c)
Insert the plug in the bottom outlet (See Fig 7)
d)
Insert the ¾” outlet where the plug was (See Fig 8)
e)
Ensure in all instances the ‘O’ rings are on the components and the
components are tightened.
3.
It is advisable prior to installation to remove the 90 degree elbows (See Fig 9), smear
the ‘O’ ring with petroleum jelly and re-fit using PTFE tape on the thread.
5
1
2
3
4
Hot Water
1/2” Male
