Sample interview questions: Can you explain the different types of pipe materials used in hydronic systems and their advantages/disadvantages?
Sample answer:
Types of Pipe Materials in Hydronic Systems
Copper
- Advantages:
- Excellent thermal conductivity
- Durable and resistant to corrosion
- Easy to work with
- Disadvantages:
- More expensive than other options
- Can be prone to electrolysis if not properly insulated
Polyethylene (PEX)
- Advantages:
- Flexible and easy to install
- Corrosion-resistant
- Can expand and contract without breaking
- Disadvantages:
- Requires specialized tools for installation
- Can become brittle in cold temperatures
Cross-linked Polyethylene (PEX-A)
- Advantages:
- Same benefits as PEX, but with improved flexibility and durability
- Can withstand higher temperatures
- Disadvantages:
- More expensive than standard PEX
Polypropylene Random Copolymer (PPR)
- Advantages:
- Highly corrosion-resistant
- Lightweight and easy to handle
- Can be heat-fused for a leak-free connection<... Read full answer
Source: https://hireabo.com/job/12_0_14/Hydronic%20Technician