Previous owners of our house (Victorian semi) had an attic conversion done. In doing so, the builders boxed in the area containing the cold water storage tank and the header tank. The plastic storage tank has sprung a leak, to which a temporary patch has been applied, but I don't expect it to last. My plumber has tried to fold up a replacement tank to fit thru the limited space available for entry to the space, without success. Does anyone make super-flexible, compressible storage tanks that can fit through a small space?