Massachusetts Plumbers Journeyman Practice Exam

Where should the expansion fitting be installed within horizontal runs exceeding 20 feet in length?

1. A. At the beginning of the run

2. B. At the end of the run

3. C. In an inaccessible location

4. D. In an accessible location

The correct answer is: D. In an accessible location

The correct choice is to install the expansion fitting in an accessible location. This is important because expansion fittings are designed to accommodate thermal expansion and contraction in piping systems. When pipes heat up, they expand, and if they are not allowed to move freely, they can become damaged or even cause leaks at joints and connections. By placing the expansion fitting in an accessible location, it ensures that future maintenance, adjustment, or inspection can be performed without significant difficulty. This consideration is vital for maintaining the integrity of the plumbing system, as it promotes ease of access while allowing for any necessary repairs or modifications. The other options do not prioritize the accessibility or functionality needed for proper maintenance of the expansion fittings and the overall piping system, which is crucial for long-term reliability and efficiency.