New York Low Pressure Boiler COF Practice 2026 – All-in-One Guide to Exam Success!

The minimum feed water piping connection size for a boiler with less than 100 square feet of heating surface is specified as 1/2 inch. This standard is established to ensure adequate water flow into the boiler, which is essential for efficient operation and to maintain the desired water level within the boiler.

Using a properly sized feed water pipe is important to support the boiler's operational needs, particularly in terms of preventing issues such as overheating or water level fluctuations. A 1/2 inch connection allows for sufficient water to enter the boiler while reducing the risk of excessive pressure drops that could lead to operational inefficiencies or even system failures.

Other sizes such as 3/4 inch, 1 inch, or 1/4 inch may either be insufficient for the required flow rate or unnecessarily large, which can complicate installation and affect system performance. The specified size helps to balance the requirements of the boiler system while adhering to safety and performance standards.