Massachusetts Plumbers Journeyman Practice Exam

According to the provided text, what should be done with piping that has been used for any purpose other than conveying potable water?

1. Painted red

2. Not be used for potable water

3. Re-piped immediately

4. Tested for contaminants

The correct answer is: Not be used for potable water

When piping has been used for any purpose other than conveying potable water, it is crucial that it is not used for potable water. This guideline is in place primarily to ensure public health and safety. Pipes that have carried substances other than safe drinking water could potentially harbor contaminants or harmful residues that could compromise the quality of potable water. The option that states that the piping should not be used for potable water emphasizes this safety measure. Ensuring that only appropriate materials are utilized in systems intended for drinking water helps prevent contamination and protects consumers. The other choices, while they may seem reasonable in certain contexts, do not directly address the fundamental principle of safeguarding the potable water supply.