13.04.460   Evaporative coolers-Recirculating pump.
   Evaporative coolers installed after January 1, 1959, shall be equipped with a recirculating pump. The makeup supply line shall be equipped with an inlet valve that shall open only when makeup water is required by the unit. The make up supply line shall be equipped with an approved air-gap. (Ord. 2001-033 § 1)