21,144 sections across 2,050 Iowa regulatory chapters.
R.481—394.3 General requirements. This rule applies to all objects covered by this chapter and
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installed prior to September 20, 2006. 394.3(1) Instruments, fittings and controls mounted inside boiler jackets. Any or all instruments, fittings and controls required by this chapter may be installed inside of boiler jackets provided the water gage and pressure gage on a steam …
R.481—394.4 Steam heating boilers installed before July 1, 1960—requirements. All steam heating
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boilers installed before July 1, 1960, shall be constructed and installed in accordance with this rule. 394.4(1) Safety valves. a. Each steam boiler will have one or more safety valves bearing the National Board “HV” stamp of the spring-pop type adjusted and sealed to discharge a…
R.481—394.5 Hot water heating boilers installed before July 1, 1960—requirements. Hot water
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heating boilers installed before July 1, 1960, shall be constructed and installed in accordance with this rule. 394.5(1) Safety relief valves. a. Each hot water heating boiler will have at least one safety relief valve bearing the National Board “HV” stamp of the automatic-resett…