Massachusetts Plumbers Journeyman Practice Exam

How much annular space should be maintained between piping and sleeves that penetrate concrete floors or walls?

1. A. Half-inch

2. B. Two inches

3. C. One inch

4. D. No space needed

The correct answer is: C. One inch

The correct answer indicates that a one-inch annular space should be maintained between piping and sleeves that penetrate concrete floors or walls. This measurement is crucial for several reasons related to plumbing installations and building codes. Maintaining a one-inch space allows for proper thermal expansion and contraction of the piping material, which can happen due to temperature changes. Without this space, pipes could become constrained, leading to damage or leaks over time. Additionally, this spacing helps with the installation process, allowing for easier handling and adjustment of pipes during construction or repairs. It also provides a pathway for the movement of debris or drainage without clogging any pipes. Building codes often dictate this spacing to ensure safety and functionality, helping to prevent issues related to structural integrity or water damage. Overall, adhering to a one-inch annular space promotes the longevity and reliability of plumbing systems in buildings.