hi, i was faced with an emergency when a friends rad sprung a leak at the inlet valve, i am no plumber but i fitted new valves to both sides of the radiator and while doing so lost alot of water from the inlet pipe side of the rad. once finished i bleed the radiator and checked all the other rads in the house for bleeding. i now have pure clean water coming out of every radiator but no heat. the rad i put new valves on gets warm only, right to the top but all other rads are cold in the house. there is a lot of knocking seemingly from the pipe from boiler to the header tank. there is only 2 water pipes to the boiler and no valves or gauges, in the loft is an emmersion tank and 2 header boxes, both 2/3 full. pump is running and pipes on both sides of the pump are hot, there is not one single bleed valve amongst all the pipework in the attic. how do i get the air out of the system and return the flow of hot water. the rad i worked on is only one warm and i let it bleed for 4 hours yesterday as bleed nipple could direct water direct into the toilet in upstairs bathroom. any help would be appreciated and i think maybe a damsel in distress will have to call on someone who knows more next time.
many thanks. colin
many thanks. colin