Section 658-110-17 - Safety and Pressure Relief Valves1. Steam and hot water boilers shall be equipped with listed or approved steam safety or pressure relief valves that conform to ASME requirements. A shut-off valve may not be placed between the relief valve and the boiler or on discharge pipes between such valves and the atmosphere.2. All steam safety or pressure relief valves shall terminate in a manner which precludes the possibility of accidental scalding in accordance with ASME.3. Steam safety or pressure relief valves which terminate in the structure shall terminate 6" to 12" above the floor.4. No valves or other obstructive devices may be installed between the boiler and any safety controls or devices. 02-658 C.M.R. ch. 110, § 17