R.C.S.A. § 29-232-77
Steam gages
Cite as Conn. Agencies Regs. § 29-232-77
Each miniature boiler shall be equipped with a steam gage having a dial range not less than one and one-half times the maximum allowable working pressure. The gage shall be connected to the steam space or to the steam connection to the gage glass by a brass or bronze composition siphon tube, or equivalent device that will keep the gage tube filled with water.