What is the minimum pipe size allowed for a condensate drain?

The minimum pipe size allowed for a condensate drain is 3/4 inch. This specification is important because condensate drains must effectively handle the discharge from systems such as air conditioning units and refrigeration equipment. Using a pipe that is too small can lead to improper drainage, resulting in blockages or overflow that could cause water damage or mold growth. A 3/4 inch diameter provides a sufficient capacity to ensure that the condensate can flow freely without risk of back-ups while still being manageable for installation and maintenance. Proper sizing also takes into account the potential volume of condensate produced during operation, ensuring that the system functions efficiently and safely.