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Discuss Leak under cistern - connecting float valve to the water supply pipe, as per photo in the Plumbing Jobs | The Job-board area at PlumbersForums.net
the problem is you are trying to fit a flat surface fitting on to a ballafix ment for an pipe and olive
Being a Saniflo guy I often have to remove the toilet to get to the pump then find the same problem when putting the toilet back so now I carry 1/2 inch brass extensions which are female / male fitting each end.
Reply to Leak under cistern - connecting float valve to the water supply pipe, as per photo in the Plumbing Jobs | The Job-board area at PlumbersForums.net