Humber/Ontario Real Estate Course 4 Exam Practice

What could lower the water pressure in a household plumbing system?

1. An obstruction in the water main

2. Corroded galvanized pipes

3. Leaky fixtures

4. Blocked bath drain

5. Flow restrictors

6. Old pipe fittings

The correct answer is: Blocked bath drain

In the context of household plumbing systems, the most relevant factors that could lower water pressure typically involve issues that affect water flow directly. An obstruction in the water main, corroded pipes, leaky fixtures, flow restrictors, and old pipe fittings are all legitimate concerns that could lead to decreased pressure. A blocked bath drain does not directly decrease water pressure within the plumbing system itself; instead, it might cause water to drain more slowly when the tap is running, giving the impression of lower pressure. However, it is the actual delivery of water and not the pressure that is affected in this scenario. The other options, like corroded galvanized pipes or old fittings, can result in buildup that restricts water flow or creates turbulence, leading to a significant drop in pressure within the system. Therefore, while a blocked bath drain may contribute to some frustration during usage, it does not fundamentally cause a reduction in water pressure throughout the home's plumbing system.