Pipes vibrating, gas water heater involved - help needed, please! very worried

[arccm]

I am currently living in Budapest and yesterday I noticed that the water gas heater was making a strange noise and vibrating, so I turned it off and turned the gas of. It didn't stop. So I opened the water in the kitchen (right next to the heater) and when I closed it the noise would stop but every time I opened it would start again (with heater and gas turned off). Today after flushing away the toiled, and while the tank was filling up with water again the noise and vibration happened again and this time around even the pipes in the bathroom sink were vibrating. But when it was filled with water it stopped again!

The pressuer on teh heater is 1,2 bar, and it should be more than 1,5bar, I believe.

I have no idea what's going on! It looks like it's the pipes, but then why would the heater vibrate too when turned off?

Should I worry? Can I turn on the gas and take shower, etc? Can someone give me some advice please? I am very worried!

 

[tamz]

It will be a problem with a stopcock or ballvalve. Best get someone to have a look. It may go away or decrease if you run a tap for a bit but it needs looking at.

 

[arccm]

Thank you so much!

Someone is coming over on friday, but can I go one with my normal life (shower, cooking, etc...) until the plumber comes?