Johnson & Starley Isolation Valves
The isolation valve can be found underneath the boiler and allows the user to control the flow of water and gas in to the central heating system. These also allow you to stop the flow completely in case of a leak or emergency.
JOHNSON AND STARLEY 1000-0019050 VALVE:BALL 22MM CW PRESSURE GAUGE
Part No: 1691922 / MPN: 1000-0019050