Abstract: Ten problems in water supply\uf001drainage have listed and analy zed, such as pipeline lays, pipeline tries pressur eand irrigation, the mass problem under constr uction of outdoo r drainag e system, floor drain, construction pr oblem of indoordrainage system, valve choice and installment, pipeline connectio n qualit y, hiding installing the pipeline, reserv e drive pipe,burises in advance and pipeline noise, and prevention measur es are pro posed.\uf000\uf000Key words: water supply\uf001drainag e; installation; pro blem! 67 !