No person shall make or maintain, or permit to be made or maintained, under his control, in the city, any installation that shall allow any sewer, drainage system, dry well, cesspool, underground leaching pit, or sub-soil drainage line to overflow, back flow or siphon into, or that shall have any connection, except through a back flow or prevention device approved by the Building Director, with, any swimming pool, artificial lake, artificial pond, reservoir, or filter connected thereto. No such device shall be approved unless it provides an air-gap of at least two pipe diameters of the discharge pipe at its outlet terminal, but never less than an air-gap of one inch. The Building Director may require such air-gap to be a space of six inches above the flood rim of a receptor of a type approved by the Building Director, installed with such flood rim at least six inches above the flood level of the adjacent surface, except that such discharge outlet terminal may be permitted to enter any receptor below its flood rim when the discharge outlet piping at its deepest point, the bottom of the filters and the bottom of the scum gutter drain trough, or overflow inlets are at least six inches above the flood rim of the receptor. All receptors connected to any part of any such drainage system, shall be properly trapped and vented as provided in the Fullerton Plumbing Code.
(Ord. 1494 § 1 (part), 1967).