Hi, we've had our tank since 2009. It was professionally fitted and from 2009 to 2015 I'd never done a thing to it. Then after a MOT report that said it would need looking at, I contacted Autogas 2000 in Thirsk who examined it. (Who I'd throughly recommend). They sandblasted and re-painted it with anti stone chip paint and re-hung it on a new cradle. I've not touched it since! All I do is fill it up and drive off. It should be visually checked on the MOT, and if you have an annual Hab Check they should find any leaks, if you don't first! I've never heard of condensation issues, and wouldn't know how or what to do if there were any! I can't recommend the system enough, and can't understand why van builders don't fit them as standard.