bluequinn,black tap on left is where you fill from,chrome fitting on left is a non return valve(to stop water from your system contaminating the main water supply) to OP you need to find your filling loop hose,these have to be taken off the boiler to comply with the water regulations.
bluequinn,black tap on left is where you fill from,chrome fitting on left is a non return valve(to stop water from your system contaminating the main water supply) to OP you need to find your filling loop hose,these have to be taken off the boiler to comply with the water regulations.