I am new to France and wanting to take an English bathroom out there to fit in our chalet in 05 (Haute Alpes). I understand that French pipes are 10,12,14,16mm etc and UK are typically 15 and 22mm - correct? Is this going to pose a problem to our English plumber who is coming out with us to do the job? What are the usual ways of solving the connections & what essential bits should he take out with him?