Sharkbite fittings in the underground: a buried treasure for durable plumbing

SharkBite fittings have revolutionized plumbing by offering a quick, tool-free connection system. However, one question that often arises is whether these fittings can be used underground. This blog post will explore the suitability of SharkBite fittings for subterranean applications, shedding light on their capabilities and limitations.

Understanding SharkBite Fittings

SharkBite fittings utilize a unique push-to-connect design that allows for effortless installation without the need for soldering, glue, or specialized tools. The fittings are composed of a durable polymer body, stainless steel teeth, and an O-ring seal. This combination ensures a leak-proof connection that can withstand various pressures and temperatures.

Can SharkBite Fittings Be Used Underground?

The answer to this question is yes, but with certain considerations. SharkBite fittings are generally suitable for underground use in cold water applications, such as water supply lines and irrigation systems. However, it’s crucial to consider the following factors:

1. Soil Conditions

SharkBite fittings are not recommended for use in highly corrosive or acidic soils. These conditions can damage the polymer body and lead to leaks.

2. Depth of Installation

While SharkBite fittings can be used underground, the depth of installation is limited. The maximum recommended depth for cold water applications is 6 feet below grade.

3. Pressure and Temperature

SharkBite fittings are rated for a maximum pressure of 200 PSI and a temperature range of 40°F to 180°F. Exceeding these limits can compromise the integrity of the fittings.

Precautions for Underground Use

To ensure the longevity and reliability of SharkBite fittings in underground applications, follow these precautions:

• Use a Sleeve: Protect the fittings from soil and moisture by encasing them in a protective sleeve.
• Backfill Carefully: Avoid using sharp or abrasive materials for backfilling. Use clean sand or soil to prevent damage to the fittings.
• Test the System: Before burying the fittings, perform a pressure test to ensure there are no leaks.

Alternatives to SharkBite Fittings for Underground Use

In some cases, SharkBite fittings may not be the ideal choice for underground applications. Consider these alternatives:

• Copper Tubing and Soldered Joints: Copper tubing with soldered joints provides a durable and reliable connection for underground use.
• PEX Tubing and Crimp Fittings: PEX tubing is flexible and corrosion-resistant, making it suitable for underground installations.

Takeaways: A Balanced Approach

SharkBite fittings offer a convenient and effective solution for many plumbing applications, including some underground uses. However, it’s essential to assess the soil conditions, depth of installation, and pressure requirements before using them underground. By following the precautions outlined in this blog post, you can ensure the longevity and reliability of your underground plumbing system.

What You Need to Learn

1. What is the maximum depth for SharkBite fittings underground?

• 6 feet below grade for cold water applications.

2. Can SharkBite fittings be used in hot water applications underground?

• No, SharkBite fittings are not recommended for hot water use underground.

3. What type of sleeve should I use to protect SharkBite fittings underground?

• A flexible, waterproof sleeve designed for underground plumbing applications.

4. Can SharkBite fittings be used in acidic soils?

• No, SharkBite fittings are not resistant to highly corrosive or acidic soils.

5. What are the alternatives to SharkBite fittings for underground use?

• Copper tubing and soldered joints, PEX tubing and crimp fittings.