53 Pa. Stat. § 24963
Standpipes of two and one-half inches in diameter shall be provided with hose attachments on every floor and gallery, as follows, namely: One on each side of the auditorium in each tier, and at least one in the property room and one in the carpenter shop, if the same be contiguous to the building. All such standpipes shall be kept clear from obstruction. Said pipes shall be separate and distinct, receiving their supply of water direct from the steam pumps, and shall be fitted with the regulation coupling of the bureau of fire and shall be kept constantly filled with water by means of an automatic steam pump or pumps of sufficient capacity to supply all the lines of hose when operated simultaneously, and said pump or pumps shall be supplied from the street main and be ready for immediate use at all times during a performance in said building.
53 P.S. § 24963