Journeyman Plumber ExamFixtures, Faucets, and Other AppliancesMedium
A plumber is installing a new bathtub and shower combination in a residential bathroom. The local code requires a minimum access opening for the bathtub trap. What is the typical minimum size for an access opening to a bathtub trap, as per most plumbing codes?
- A6 inches by 6 inches
- B16 inches by 20 inches
- C8 inches by 8 inches
- D12 inches by 12 inches
Show answer & explanationAnswer & explanation
Correct answer: D. 12 inches by 12 inches
Most plumbing codes, such as the IPC and UPC, require a minimum access opening of 12 inches by 12 inches for bathtub traps. This size ensures sufficient room for inspection, maintenance, and repair.
Why the other options are wrong
- A. 6x6 inches is too small for effective access to a bathtub trap.
- B. 16x20 inches is a size often used for larger access panels, but 12x12 is the minimum for a bathtub trap.
- C. 8x8 inches is also generally considered too small for proper access and work space.
Bathtub Trap Access Opening
A required opening in the wall or enclosure surrounding a bathtub, providing access for inspection, maintenance, or repair of the bathtub trap.
- Ensures serviceability of hidden plumbing components.
- Prevents the need for demolition for simple repairs.
- Minimum size typically 12 inches by 12 inches.
Memory trick: Access openings are like secret doors for plumbers to get to hidden parts.