(1) No direct mechanical connection is allowed between the potable water supply and the pool, spa, or other water feature; chemical feeder equipment; or the pool, spa, or other water feature piping that would permit sewage or waste water to enter the recirculation system or that would permit water from the recirculation system, pool, spa, or other water feature to enter the make-up water supply.

(2) Where water from an approved water source is added to the pool, spa, or other water feature, cross connections between the public water system and water in the pool, spa, or other water feature shall be eliminated by pumping make-up water from a pump suction well or by admitting water by means of an air-gapped supply, preferably located under a low diving board.

(3) If an over-the-rim water supply spout is used it shall be located under a diving board, adjacent to a ladder, or shall otherwise be properly shielded in order to minimize tripping hazards. Additionally:

(a) the open end of the spout shall have no sharp edges and shall not protrude more than two inches beyond the edge of a pool; and

(b) the spout shall be separated from pool water by an air gap of at least six inches between the flood level of the pool and the lowest point of the spout.

(4) No direct connections to sewers shall be permitted. The drain system for any pool, spa, or other water feature may not be directly connected to a sewer in a manner that would permit back flow of the sewer into the pool, spa, or other water feature.

(5) Where a surge or balancing tank is used, the point of discharge from the make-up water line into the surge or balancing tank shall be at least six inches above the rim of the tank.