Concentric thermostatic mixer valve
Typical suitable installations
tYPIcaL DomEStIc InStaLLatIonS
Domestic gravity fed systems (
fig.)
The shower control MUST be fed from a cold
water cistern and hot water cylinder providing
nominally equal pressures. There must be a
minimum of one metre head of water. The
minimum head distance is measured from the
base of the cold water cistern to top of the
showerhead.
If valves are gravity fed then supply pressure
should be verified to ensure conditions of use
are appropriate for the valve.
Pumped gravity fed systems (
fig.)
The shower control MUST be fed from a cold
water cistern and hot water cylinder providing
nominally equal pressures.
The mixer unit may be used with a gravity fed
system with a pump to boost pressures as shown;
please refer to the pump installation guide to
establish the minimum head requirements for
automatic operation of the pump
*(
kits are for illustration purposes only)
Hot water
cylinder
Cold supply
Hot supply
Alternative supply
(must be below
vent pipe tee)
Cold
water
mains
supply
Drain
valve
Gate
valve
Stop valve
Cold water
cistern
Minimum head
Other
draw-offs
Draw-off must point down
to avoid airlock issues
Service
valves
Mixer
Kit
Hot water
cylinder
Mixer
Cold supply
Hot
supply
Alternative supply
(must be below
vent pipe tee)
Cold
water
mains
supply
Drain
valve
Gate
valve
Stop valve
Cold water
cistern
Minimum head
Other
draw-offs
Draw-off must point
down to avoid airlock
issues
Ring main
Isolating switch or
pull cord switch
(both fused at 3A)
Service
valve
Service
valve
Pump
Mixer
Mixer
*Fig.
*
(diagrammatic view – not to scale)
*Fig.
*
(diagrammatic view – not to scale)
