What is the minimum connection size for a bottom blow-off?

The minimum connection size for a bottom blow-off is defined by applicable plumbing codes and industry standards, which ensure that the blow-off valve is able to effectively purge sediment and impurities from a tank or system. A connection size of 1 inch is often stipulated as sufficient for the flow rates required to achieve effective blow-off. This size allows for the removal of accumulated sediment without causing excessive velocity that might disturb other tank operations or lead to erosion of the connection point.

Larger sizes, while potentially allowing for more rapid discharge, may not be necessary for standard operations and can complicate installation and maintenance tasks. Additionally, an oversized connection could lead to pressure loss or other inefficiencies in the system. Therefore, establishing a 1-inch connection meets the operational requirements while maintaining system integrity and compliance with standards.