hello, i know this is a botch up but i need some help, i am installing a macerator into a downstairs room, adjacent is an existing toilet, because of the location of this room i cant run direct up into loft to attach to soil, i cant dig down to locate sewer pipe, so my only alternative is to somehow connect onto the back of the existing toilet. what can i use to connect the 22mm pipe into the back of the existing toilet waste pipe, and what are the possible complications in doing this, any help would be appreciated.