What is the minimum diameter required for a water column drain and blowdown pipe?

The minimum diameter required for a water column drain and blowdown pipe is 3/4 inch. This specification is important because it ensures adequate flow for the removal of water and sediment from the boiler, which prevents system inefficiencies and potential damage. A pipe that is too small may lead to restricted flow, causing problems such as pressure build-up and improper drainage. The standardized diameter helps maintain the functionality and safety of the boiler system by allowing for sufficient drainage capacity and minimizing the risk of clogs. Therefore, a 3/4 inch diameter provides a reliable balance between performance and ease of maintenance.