Sample interview questions: Can you explain the different types of materials commonly used in plumbing systems and their advantages/disadvantages?
Sample answer:
The different types of materials commonly used in plumbing systems include copper, PEX (cross-linked polyethylene), PVC (polyvinyl chloride), and galvanized steel. Each material has its own unique advantages and disadvantages.
Copper piping is one of the most widely used materials in plumbing systems. Its main advantage is its long lifespan, as copper pipes can last for decades without corroding or degrading. Copper is also resistant to high temperatures and can withstand high water pressure, making it suitable for both hot and cold water supply systems. Additionally, copper pipes are relatively easy to install and can be soldered or joined using compression fittings. However, copper can be more expensive compared to other materials, and its installation requires skilled labor due to the need for soldering or compression fittings.
PEX piping has gained popularity in recent years due to its flexibility, ease of installation, and cost-effectiveness. PEX is a flexible plastic material that can be bent and shaped to fit around obstacles, making it a great choice for retrofitting or remodeling projects. PEX pipes are also resistant to corrosion and freeze damage, making them suitable for both indoor and outdoor applications. Additionally, PEX is compatible with various connection methods, including crimp, clamp, and push-fit fittings, which simplifies the installation process. However, PEX may not be suitable for applications that require exposure to direct sunlight or high temperatures, as it can degrade over time.
PVC piping is commonly used for drain, waste, and vent (DWV) systems. PVC pipes are lightweight, easy to handle, and resistant to corrosion and ch… Read full answer
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