§ 22-31. Pool filters.

(a)

Every private swimming pool shall be equipped with a recirculating system capable of filtering the entire contents of the pool in 12 hours or less.

(b)

Filters shall be capable of maintaining the clarity of the water to permit the ready identification, through an eight-foot depth of water, of a disc two inches in diameter which is divided into four quadrants in alternate colors of red and white.

(c)

Filter capacity shall be such that it need not be cleaned more frequently than once every four days under proper conditions of water and operation.

(d)

All pressure filters shall be equipped with influent and effluent pressure gauges to determine the pressure differential and frequency of cleaning. All other filter shall be equipped with at least one pressure vacuum or compound gauge, as applicable, which shall be positioned in such a way as to determine the differential across the filter and the need of cleaning.

(e)

All pressure filter systems shall be equipped with an air release at the high point in the system.

(f)

Operating instructions shall be posted on every filter system. All valves shall be properly designated, indicating their purpose.

(g)

When dissimilar metals are used in the construction of the filter, which may set up galvanic currents, then suitable provision shall be made to resist electrolytic corrosion.

(h)

Filters shall be so designed and installed that they can be readily disassembled and the filter elements removed.

(Code 1985, § 309.19)