Sanitary facilities; they are intended to safely remove from buildings; although not necessarily economic; sewage and rainwater; in addition to establishing seals or hydraulic traps; to prevent the gases and bad odors produced by the decomposition of the organic matter carried; they go out where the sanitary furniture is used or through the drains in general. the installations; sanitary; they must be projected and mainly constructed; trying to take full advantage of the qualities of the materials used; and settle in the most practical way possible; so that constant and unjustified reparations are avoided; foreseeing a minimum maintenance; which will consist of normal operating conditions; in giving the required periodic cleaning through the records.