§ 18.23. Recirculation and filtration.
(a) A pool shall be provided with a recirculation and filtration system, except when there is a flow of water of the quality and quantity through the pool which at all times conforms to § § 18.2218.29.
(b) When sand or anthrafilt filters are used, equipment shall be provided capable of continuously adding with reasonable accurate dosage, coagulant ahead of the filters.
The provisions of this § 18.23 adopted September 18, 1971, effective September 18, 1971, 1 Pa.B. 1921.
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