11
COLD WATER
SHUT OFF
VALVE
HOT WATER
SHUT OFF
VALVE
SUPPLY WATER
SHUT OFF VALVE
OUTSIDE
TAP
WATER
SOFTENER
BOILER
FLOW
BOILER
RETURN
EXPANSION
DISCHARGE
HTPV
DRAIN
DRAIN
ACCUMULATOR
UNVENTED
CYLINDER
BALANCED
COLD SUPPLY
TO TAPS
INCOMING
MAINS
SUPPLY
SINGLE
CHECK
VALVE
PRV
HEATING
SYSTEM
FILL
KITCHEN
SINK COLD
TAP
PRESSURE
REDUCING
VALVE
OPERA
OPERA
OPERA
OPERA
OPERATOR CONTROLS 2
TOR CONTROLS 2
TOR CONTROLS 2
TOR CONTROLS 2
TOR CONTROLS 2
2-4
Shut Off Valves
The Dualstream installation will have a number of shut off valves, the location of these
will be dependent on the installation - fig. 2-4a shows a typical layout.
2-4.1 Stop Cock
Normally located at the point where the mains supply enters the dwelling.
Shuts off the mains water supply to the dwelling.
2-4.2 Single Check Valve
(If fitted)
Normally located after the Stop Cock. Prevents water back feeding to main.
Shuts off the mains water supply to the dwelling.
2-4.3 Cold Water Shut Off Valve
Normally located in the cold feed close to the accumulator.
Shuts off the cold water to the taps.
2-4.4 Supply Water Shut Off Valve
Normally located where the cold supply connects to the combination valve on the
cylinder.
Shuts off the cold supply to the Dualstream system.
2-4.5 Hot Water Shut Off Valve
Normally located where the Domestic Hot Water feed comes from the cylinder.
Shuts off the hot water to the taps.
Note
When opening the stop cock turn the valve
fully open then close ½ turn, this prevents
the valve sticking.
Fig. 2-4b Valves
OPEN
CLOSED
Fig. 2-4a Typical Shut Off Valve Locations
IMPORTANT Before closing
ANY valve:-
1. Switch OFF the Electric Immersion Heater.
2. Turn OFF the Heating System.
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