Yes, brass PEX fittings can be buried, but there are some important considerations to ensure durability and prevent potential issues:
1. Corrosion Risk: Brass is more susceptible to corrosion when in contact with certain soils, especially if the soil contains high moisture or is acidic. Over time, this can lead to pitting and leaks in buried fittings.
- Solution: Wrapping the fittings in protective tape or encasing them in a protective sleeve can help prevent direct contact with the soil, reducing corrosion risk.
2. Use Lead-Free Brass: Make sure that the brass fittings are lead-free and certified for potable water use, especially if the system is for drinking water.
3. Backfill Material: Avoid using sharp or rocky backfill around the buried fittings, as it could cause damage. Opt for soft, clean fill material to protect the fittings and the PEX tubing.
4. Soil Conditions: In areas with particularly corrosive soils, it might be worth considering alternative fittings such as plastic (polymer) PEX fittings, which are corrosion-resistant and often recommended for direct burial.
- Plastic PEX Fittings: These are often preferred for underground installations because they are not susceptible to corrosion, making them a safer long-term option in harsh soil conditions.
By taking these precautions, brass PEX fittings can be buried, but if you're concerned about soil conditions, plastic fittings might be a better alternative.
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