Introduction
Can you use compression fittings on polyethylene? The answer is yes. Compression fittings provide a reliable and efficient way to connect polyethylene pipes in various applications. This article will explore the use of compression fittings on polyethylene, their benefits, applications, and how they work.
What Are Compression Fittings?
Compression fittings are mechanical connectors used to join pipes and tubing without the need for soldering, welding, or other fusion methods. They consist of a fitting body, a compression nut, and a compression sleeve or ferrule. When tightened, the compression nut forces the sleeve or ferrule to bite into the pipe, creating a secure and leak-tight seal.
Types of Compression Fittings for Polyethylene
Several types of compression fitting are specifically designed for use with polyethylene pipes. These include brass compression fittings, polyamide (PA) compression fitting, and metal mechanical cold flare compression fitting. Brass compression fitting are commonly used in potable water installations, while PA compression fitting are suitable for high-pressure gas applications. Metal mechanical cold flare compression fitting are intended for use with cross-linked polyethylene (PEX) tubing in hot and cold water distribution systems.
Benefits of Using Compression Fittings on Polyethylene
Using compression fitting on polyethylene offers several benefits. They are quick and easy to install, requiring only hand tools. Compression fittings eliminate the need for flame or heat, making them safer to use in environments where fire hazards are a concern. Additionally, they provide a reliable seal that can withstand high pressures and temperatures, ensuring long-term performance.
How Compression Fittings Work on Polyethylene
Compression fitting work on polyethylene by creating a mechanical seal between the fitting and the pipe. When the compression nut is tightened, it forces the compression sleeve or ferrule to compress and bite into the outer surface of the polyethylene pipe. This action creates a secure connection that prevents leaks. The material of the compression fitting, such as brass or polyamide, is chosen to ensure compatibility and durability with the polyethylene pipe.
Applications of Compression Fittings on Polyethylene
Compression fittings are widely used in various applications involving polyethylene pipes. In plumbing systems, they are commonly used to connect polyethylene tubing for potable water supply. In natural gas distribution, LP gas, and yard gas systems, PA compression fitting provide a quick and reliable connection. In hydronic heating systems, metal mechanical cold flare compression fitting are used to join PEX tubing in hot water distribution lines.
Example of Using Compression Fitting on Polyethylene
Consider a residential plumbing system that uses medium-density polyethylene (MDPE) pipe for the underground water supply line. To connect the MDPE pipe to a brass water meter, a brass compression fitting can be used. The fitting includes a compression nut, sleeve, and tee coupler designed specifically for MDPE. By inserting the MDPE pipe into the tee coupler and tightening the compression nut, a secure and leak-tight connection is achieved.
Conclusion
In conclusion, compression fitting are an effective and efficient way to connect polyethylene pipes in various applications. They offer quick and easy installation, safety advantages, and reliable performance. With the right type of compression fitting for the specific application, polyethylene pipes can be connected with confidence, ensuring a secure and leak-tight system. Whether it’s for potable water supply, natural gas distribution, or hydronic heating systems, compression fitting provide a versatile and reliable solution for joining polyethylene pipes.
