I've just bought a house and there is a relatively new Valiant boiler in the laundry. I would like to move this boiler to a rental home that I own and purchase a new boiler for the new house. My gas man tells me I cannot do this - that once registered, a boiler cannot be reregistered at a new address. Is this true. Shame, it looks a new boiler, and I shall be just throwing it away.