Section 041-13-3 - Existing Low Pressure BoilersA.Rules Applicable to Construction and Installation. The design, construction, construction-related inspection, installation, and stamping of all existing low pressure boilers must comply with the rules of the Board in effect at the time of installation.B.Rules Applicable after Installation. The maintenance, operation and post-installation inspection of all existing low pressure boilers must comply with the rules of the Board in effect at the time of the maintenance, operation, or post-installation inspection.02-041 C.M.R. ch. 13, § 3