28 Pa. Code § 18.72 – Cross connections.

(a) Cross connections are not permitted.
(b) A cross connection is considered broken if a minimum air gap of at least twice the diameter of the water pipe is provided where potable water enters the pool and where pool water or water from the recirculation system is discharged to a sewer system.

The provisions of this § 18.72 adopted September 18, 1971, effective September 18, 1971, 1 Pa.B. 1921.