An owner of a public pool or spa shall ensure that: Pool and spa equipment is installed according to manufacturers' instructions and this chapter; Valves, controls, gauges, filters, pumps, feeders, and other operating equipment are easily accessible; Valves, controls, and piping are permanently numbered, labeled, or color-coded to identify their purpose or function; and Operating instructions for the circulation and water treatment systems: Refer to the number, label, or color code of the valves, controls, and piping, and Are posted in the equipment room in a water-resistant cover.