What is the proper distance that a trap arm should be installed from a fixture?

The proper distance that a trap arm should be installed from a fixture is generally considered to be between 6 to 10 feet. This guideline is established to ensure the effective functioning of the plumbing drainage system. When the distance is kept within this range, it helps to maintain a proper flow of wastewater while minimizing the potential for siphoning and maintaining an adequate venting system.

If the trap arm is too short, it can lead to problems such as slow drainage or backflow, while if it's too long, it can cause increased resistance to the flow and potential for clogging. By adhering to the 6 to 10 feet range, plumbers can ensure that the drainage system operates efficiently, maintaining both safety and functionality in accordance with plumbing codes.