Which trap size corresponds to a lip urinal?

A lip urinal typically requires proper drainage and venting to function effectively. The standard size for a trap associated with a lip urinal is 1 1/2 inches. This size allows for sufficient drainage while ensuring that the urinal operates within the plumbing system's requirements. Using the appropriate trap size helps prevent waste blockage and maintains proper flow.

In plumbing systems, each fixture is designed with specific trap sizes that correspond to their function and expected waste load. For instance, larger traps, such as 2 inches, 3 inches, or 4 inches, are generally designated for more substantial plumbing fixtures, like toilets or industrial drains, which have larger waste volumes. Therefore, using a 1 1/2-inch trap is ideal for a lip urinal, as it is sufficient for its intended use and helps with the efficient drainage of urine.