How to replace expansion pipe (vessel) on water side for a Viessman boiler step by step
This video is for GAS SAFE ENGINEERS only, always follow manufacturer instructions.
Before to start any work on gas appliance isolate the power, turn off the gas and the waters.
Expansion pipe (vessel) is leaking
1. Download manual
viessmanndirect.co.uk/files//...
2. Remove front cover
3. Isolate the cold water
4. Drain the hot water
5. Leave open the drain point
6. Remove the clip
7. Pull out the expansion pipe
8. Insert the new expansion pipe and clip
9. Turn on the cold water