Uncover the Buried Secret: Is Burying PEX Fittings a Plumbing Disaster?
What To Know
- Fittings that use a nut to compress a ferrule onto the tubing.
- Place a marker, such as a flag or tape, above the buried PEX fittings.
- By following the guidelines outlined in this guide, you can confidently bury PEX fittings underground, ensuring a reliable and durable plumbing system.
Polyethylene cross-linked (PEX) tubing has revolutionized plumbing due to its flexibility, durability, and resistance to corrosion. However, when it comes to underground applications, the question arises: can I bury PEX fittings? The answer is yes, but it requires careful planning and adherence to specific guidelines. This comprehensive guide will provide you with all the information you need to confidently bury PEX fittings underground.
Understanding PEX Fittings
PEX fittings are crucial components in any plumbing system, connecting different sections of tubing. They come in various types, including:
- Barbs: Push-to-connect fittings with teeth that grip the tubing.
- Clamps: Fittings that use metal clamps to secure the tubing.
- Crimps: Fittings that require a specialized tool to crimp the tubing onto the fitting.
- Compression: Fittings that use a nut to compress a ferrule onto the tubing.
Burying PEX Fittings: Best Practices
To ensure the longevity and functionality of your underground PEX piping system, follow these best practices:
1. Choose the Right Fittings
Not all PEX fittings are suitable for underground burial. Use only fittings specifically designed for underground use, such as those made of brass, stainless steel, or certain types of plastic. Avoid using plastic fittings that are not UV-resistant as they can degrade over time.
2. Protect Fittings from Moisture
Moisture can cause corrosion and damage to PEX fittings. Wrap each fitting with electrical tape or use a sealant to prevent water from seeping into the connection.
3. Use a Conduit or Sleeve
For added protection, consider running your PEX tubing through a conduit or sleeve. This will shield the fittings from soil, rocks, and other debris that could damage them.
4. Trench Depth and Backfill
Bury your PEX fittings at a depth of at least 12 inches below the frost line. Use clean backfill material, such as sand or gravel, to surround the fittings and provide drainage.
5. Allow for Expansion and Contraction
PEX tubing expands and contracts with temperature changes. Provide ample slack in the tubing to accommodate this movement. Avoid sharp bends or kinks.
6. Use a Marker
Place a marker, such as a flag or tape, above the buried PEX fittings. This will help you locate them easily in the future if necessary.
7. Pressure Test
Once your PEX fittings are buried, perform a pressure test to ensure there are no leaks. This should be done by a qualified plumber.
Advantages of Burying PEX Fittings
Burying PEX fittings underground offers several advantages:
- Protection from Freezing: Underground fittings are protected from freezing temperatures, which can cause pipes to burst.
- Reduced Noise: Buried PEX fittings minimize noise from water flow, creating a quieter living environment.
- Aesthetic Appeal: Burying PEX fittings eliminates unsightly pipes and fittings from your yard or garden.
- Increased Security: Underground fittings are less vulnerable to vandalism or accidental damage.
The Bottom Line: Burying PEX Fittings with Confidence
By following the guidelines outlined in this guide, you can confidently bury PEX fittings underground, ensuring a reliable and durable plumbing system. Remember to use appropriate fittings, protect them from moisture, use a conduit or sleeve, provide for expansion and contraction, and pressure test your system after installation. With proper planning and execution, your buried PEX fittings will provide you with years of trouble-free performance.
Frequently Discussed Topics
1. What is the best type of PEX fitting for underground burial?
Brass or stainless steel fittings are recommended for underground use due to their durability and corrosion resistance.
2. How deep should I bury PEX fittings?
At least 12 inches below the frost line.
3. Can I use regular PEX fittings underground?
No, only fittings specifically designed for underground use should be buried.
4. How do I protect fittings from moisture?
Wrap them with electrical tape or use a sealant.
5. Is it necessary to use a conduit or sleeve?
It is recommended for added protection from soil and debris.
6. How do I allow for expansion and contraction?
Provide ample slack in the tubing and avoid sharp bends or kinks.
7. How do I pressure test my system?
Contact a qualified plumber to perform a pressure test.
