A ring main is a pneumatic supply in which outlet valves are connected to the mains supply through a ring circuit. Channeling is an add-on to the ring main as it supports and secures valves, piping, fittings etc
A ring main is a pneumatic supply in which outlet valves are connected to the mains supply through a ring circuit. Channeling is an add-on to the ring main as it supports and secures valves, piping, fittings etc