What is the minimum size of feed water piping for boilers with less than 100 sq ft of heating surface?

The minimum size of feed water piping for boilers with less than 100 square feet of heating surface is established to ensure adequate flow and prevent issues related to pressure drops and flow restrictions. A diameter of 1/2 inch is considered the minimum acceptable size, as it allows sufficient feed water flow to the boiler without causing significant friction losses.

This size helps maintain efficient operations, especially when the boiler is under varying load conditions. Properly sized feed water piping is crucial for maintaining boiler efficiency and longevity, as inadequate piping could lead to water hammer, inconsistent water levels, and potential operational inefficiencies. Keeping the feed water flow optimal is vital for boiler health, particularly in smaller systems where flow dynamics can significantly affect performance.

The larger options would unnecessarily increase material costs and installation complexity, while sizes smaller than a 1/2 inch might not provide adequate flow, potentially leading to operational problems. Thus, 1/2 inch is recognized as the standard minimum to ensure reliable water supply to the boiler.