Hope you remebered the half-turn back to turn it OFF once the pressure was right!!!
Also, there seems to be no check valve on the fill, to prevent back-flow from CH system into the cold main!. That's the main reason why there should be a 'proper' filling loop.
Also, there seems to be no check valve on the fill, to prevent back-flow from CH system into the cold main!. That's the main reason why there should be a 'proper' filling loop.