Humber/Ontario Real Estate Course 4 Exam Practice

Which material characteristic of residential water supply pipes can reduce water pressure over time?

1. Copper piping is less expensive than plastic piping.

2. Plastic piping was previously popular but is now less common.

3. Galvanized pipes can lead to decreased water pressure over time.

4. Lead pipes, properly installed, pose no health risk.

5. PVC pipes can easily be damaged by freezing temperatures.

6. Plastic pipes are prohibited in new construction.

The correct answer is: Galvanized pipes can lead to decreased water pressure over time.

The material characteristic of galvanized pipes that can lead to decreased water pressure over time hinges on the corrosion process that these pipes undergo. Galvanized steel pipes are coated with zinc to prevent rusting, but as time passes, the zinc coating can wear away or corrode, leading to rust build-up on the inside of the pipes. This accumulation of rust can narrow the diameter of the pipes, create blockages, and reduce the overall flow of water, which results in diminished water pressure. In contrast, other options mention attributes that do not directly correlate with the issue of water pressure decline. For instance, while copper and plastic piping may have cost differences, that factor does not influence their capacity to maintain water pressure. Similarly, the decreased popularity of plastic piping or its susceptibility to temperature damage does not inherently imply a risk to water pressure. Additionally, lead pipes pose significant health risks regardless of installation quality, and the prohibition of plastic pipes in new construction does not address any rising water pressure concerns. Understanding the specific implications of material characteristics, such as those associated with galvanized pipes, is essential for addressing residential water supply issues effectively.