I have just had 2 new vented hot water cylinders installed by a plumber (not yet finished) however I am a little concerned as the pipes are not attached to anything, the empty tank on the left wobbles a little on uneven floor and is slightly on the wonk. The plumber is really great but this was installed by his apprentice and as yet I have not said anything. I am not a plumber so I don't know but should I be worried and say something or am I worrying over nothing ? Thank you.