Safety and Pressure Relief Valves And Controls
NYC Mechanical Code § MC 1006
in effectSection MC 1006: Safety and Pressure Relief Valves And Controls
1006.1 Safety valves for steam boilers.
Steam boilers shall be protected with a safety valve in accordance with the ASME Boiler and Pressure Vessel Code or ASME CSD-1
1006.2 Safety relief valves for hot water boilers.
Hot water boilers shall be protected with a safety relief valve in accordance with the ASME Boiler and Pressure Vessel Code or ASME CSD-1.
1006.3 Pressure relief for pressure vessels.
Pressure vessels shall be protected with a pressure relief valve or pressure-limiting device as required by the manufacturer's instructions for the pressure vessel and in accordance with the ASME Boiler and Pressure Vessel Code or ASME CSD-1.
1006.4 Standards of safety and safety relief valves.
Safety and safety relief valves shall be listed and labeled, and shall have a minimum rated capacity for the equipment or appliances served. Safety and safety relief valves shall be set at not greater than the nameplate pressure rating of the boiler or pressure vessel and shall be in accordance with the ASME Boiler and Pressure Vessel Code or the ASME CSD-1.
1006.5 Installation.
Safety or relief valves shall be installed directly into the safety or relief valve opening on the boiler or pressure vessel. Valves shall not be located on either side of a safety or relief valve connection. The relief valve drain shall discharge by gravity to a nonhazardous point of discharge without obstruction.
1006.6 Safety and relief valve discharge.
Safety and relief valve discharge pipes shall be of rigid pipe that is approved for the temperature of the system. The discharge pipe shall, at a minimum, be the same diameter as the safety or relief valve outlet. Safety and relief valve discharge pipes shall be properly supported to prevent stress on the valve and vessel. Safety and relief valves shall not discharge so as to be a hazard, a potential cause of damage or otherwise a nuisance. Discharge of hazardous materials must be properly contained in a method approved by the department. High-pressure-steam safety valves shall be vented to the outside of the structure. Where a low-pressure safety valve or a relief valve discharges to the drainage system, the installation shall conform to the New York City Plumbing Code.
1006.7 Boiler safety devices.
Boilers shall be equipped with controls and limit devices as required by the manufacturer's instructions and the conditions of the listing.
1006.8 Electrical requirements.
The power supply to the electrical control system shall be from a two-wire branch circuit that has a grounded conductor, or from an isolation transformer with a two-wire secondary. Where an isolation transformer is provided, one conductor of the secondary winding shall be grounded. Control voltage shall not exceed 150 volts nominal, line to line. Control and limit devices shall interrupt the ungrounded side of the circuit. A means of manually disconnecting the control circuit shall be provided and controls shall be arranged so that when deenergized, the burner shall be inoperative. Such disconnecting means shall be capable of being locked in the off position and shall be provided with ready access.
1006.8.1 Remote control (shutdown).
A remote control shall be provided to stop the flow of oil and/or gas and combustion air to any burner or fuel-burning internal combustion equipment. Such a control shall be provided along every means of egress from the room in which the burner or equipment is located. Each remote control shall be located outside of, but as close as practicable to the burner or equipment room itself and shall be labeled: "REMOTE CONTROL FOR BURNER."
Exception: Where an outside location is impracticable, the remote control shutdown may be provided immediately inside the room in which the burner or equipment is located. Such location must be accessible at all times.
1006.9 Carbon monoxide detectors.
Carbon monoxide detectors shall be provided in all fuel-fired appliance rooms to detect the level of carbon monoxide in the room and signal an alarm. Such detectors shall be listed and installed in accordance with Chapter 9 of the New York City Building Code.
Source: City of New York, Charter, Administrative Code and Rules (American Legal Publishing XML export, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/newyorkcity/latest/NYCadmin/0-0-0-195487Fetched: 10/24/2026