I have a Vaillant TCW Sine T3W combi-boiler connected to a closed heating system. I have removed the radiator at the end of the system in order to reposition it. I am trying to drain the system via a stop valve which is located below the boiler (the boiler is housed in an upstairs room) but no water is coming from the valve when it is opened. Can anyone offer any advice as to how I can drain the system? Many thanks
- posted
20 years ago