PEX (cross-linked polyethylene) tubing is a flexible and durable alternative to traditional copper piping in residential plumbing applications. Here, we’ll outline the steps for planning and installing a PEX plumbing system in your house:
Planning
1. System Selection:
- Research different PEX systems: trunk-and-branch, parallel, and zone.
- Consult plumbing codes and professionals for guidance in selecting the appropriate system.
2. Sizing PEX Tubing:
- Determine the required water flow and pressure for each fixture.
- Consult sizing charts or consult a professional to select the proper diameter of PEX tubing for each application.
Choosing Materials and Tools
3. Selecting PEX Tubing:
- Consider PEX types: PEX-A, PEX-B, and PEX-C, each with its unique characteristics.
4. Choosing Fittings:
- Select high-quality, lead-free fittings compatible with the chosen PEX type.
5. Essential Tools:
- Invest in a PEX tool kit that includes a tubing cutter, crimping or expansion tool, clamps, and a go/no-go gauge.
Installation
6. Cutting PEX Tubing:
- Use a PEX tubing cutter for clean and square cuts.
7. Routing and Supporting:
- PEX’s flexibility makes it adaptable to routing around corners and through joists.
- Secure the tubing every 32 inches on horizontal runs and at each floor level for vertical runs.
8. Making Connections:
- Follow manufacturer instructions and utilize appropriate tools to create leak-free connections.
Avoiding Mistakes
9. Properly Support PEX:
- Prevent strain on connections by installing appropriate supports.
10. Use Correct Tools and Techniques:
- Avoid over- or under-tightening fittings and ensure tool compatibility with the selected PEX type.
11. Protect PEX:
- Shield PEX from sunlight and UV exposure.
Final Steps
12. Testing for Leaks:
- Conduct a pressure test per code requirements.
- Visually inspect all connections for potential leaks.
13. Maintenance and Care:
- Regularly check your PEX plumbing and address any issues promptly.
By following these guidelines, you are empowered to install a safe, efficient, and durable PEX plumbing system that benefits your home.
