Sorry. Amateur question here.
I'm replacing old rads with new 'uns and TRVs. The boiler is COMBI (Valliant) but I can't find a drainoff anywhere. A few questions:
1) Should there be a drainoff or can I do it directly from the boiler?
2) Should I fit one (or more?) drainoffs? If so, better to the lockshield or directly on the pipe is ok?
3) Do I need one normal valve or some kind of bypass valve to ensure everything works properly?
Finally, there is a thermostat in one of the rooms, but I'm pretty sure it doesn't work properly.
Ok, I might be out of my depth here so before I call a plumber, any advice is appreciated... So at least I know what I'm talking about.
I'm replacing old rads with new 'uns and TRVs. The boiler is COMBI (Valliant) but I can't find a drainoff anywhere. A few questions:
1) Should there be a drainoff or can I do it directly from the boiler?
2) Should I fit one (or more?) drainoffs? If so, better to the lockshield or directly on the pipe is ok?
3) Do I need one normal valve or some kind of bypass valve to ensure everything works properly?
Finally, there is a thermostat in one of the rooms, but I'm pretty sure it doesn't work properly.
Ok, I might be out of my depth here so before I call a plumber, any advice is appreciated... So at least I know what I'm talking about.