Hi gents ive been told that you can change rad valves without having to drain the system on these boilers. not quite sure about this any ideas.
viessmann condensing boiler
- Thread starter lanber
- Start date
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Hi muggles it is a sealed system
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P
Phill Peck
You can change a rad valve on any system without draining.
Some systems may result in a little damp
Some systems may result in a little damp
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