When installing a P trap, what is the maximum vertical distance allowed from the fixture to the crown vent?

The correct response indicates that the maximum vertical distance allowed from the fixture to the crown vent when installing a P trap is 24 inches. This specification is important because it helps ensure proper drainage and prevents issues such as siphoning in the plumbing system.

Allowing a maximum distance of 24 inches ensures that wastewater can flow freely through the trap and up into the venting system without creating air pressure issues that could lead to clogs or improper drainage. Maintaining this distance contributes to effective venting, which is essential for preventing sewer gases from entering the living spaces and ensuring the proper function of the plumbing system.

Different distances may apply in other contexts or configurations. However, adherence to the 24-inch standard is crucial for maintaining optimal plumbing function and compliance with plumbing codes, which are designed to protect health and safety.