What is the minimum pipe size required for a hose bib?

The minimum pipe size required for a hose bib is correctly identified as 1/2 inch. This size is standard because it provides adequate flow for typical residential outdoor watering needs, such as for connecting hoses or using a sprinkler system. A 1/2 inch pipe can handle a sufficient volume of water for these applications without significant pressure loss or flow issues.

Larger pipe sizes, such as 3/4 inch or 1 inch, while capable of delivering higher volumes and pressures, exceed the minimum requirements and are generally not necessary for standard hose bib installations. A pipe size of 1/4 inch would be inadequate, as it would restrict flow and may lead to poor performance or difficulty in watering tasks. Thus, 1/2 inch is a practical and efficient choice for hose bib installations.