What is the minimum condensate pipe diameter required for up to 20 tons of refrigeration?

For systems with up to 20 tons of refrigeration, the minimum condensate pipe diameter required is 3/4 inch. This specification is set to ensure that the condensate can drain effectively and that there is adequate capacity to handle the anticipated flow. The 3/4 inch diameter strikes a balance between sufficient drainage capability and maintaining a manageable pipe size within the plumbing system. A smaller diameter may lead to drainage issues, such as clogging or backup, particularly if the condensate flow is substantial during operation. Thus, using a 3/4 inch pipe helps to accommodate the volume of condensate produced without risking operational problems.