About PEX Fittings

PEX (cross-linked polyethylene) fittings are widely used in plumbing systems for their flexibility, durability, and ease of installation. There are various types of PEX fittings available, designed to connect and transition PEX pipes in different configurations. Here are some common types of PEX fittings:

  1. PEX Crimp Fittings: Crimp fittings are one of the most commonly used types of PEX fittings. They consist of brass or poly-alloy fittings with barbed ends that are inserted into the PEX pipe. A copper or stainless steel crimp ring is then placed over the fitting and crimped using a crimping tool to create a secure connection.

  2. PEX Clamp (Cinch) Fittings: Clamp fittings, also known as cinch or pinch clamp fittings, provide an alternative to crimp fittings. These fittings have a ring or collar made of stainless steel that is placed over the PEX pipe. A specialized clamp tool is used to compress the ring, creating a tight connection between the fitting and the pipe.

  3. PEX Push-to-Connect Fittings: Push-to-connect fittings offer a convenient and tool-free installation method. These fittings have a built-in push-fit mechanism that allows the PEX pipe to be inserted directly into the fitting. The fitting's internal components, typically made of brass, securely grip the pipe without the need for any additional tools or rings.

  4. PEX Compression Fittings: Compression fittings are designed to join PEX pipes using a compression nut and ring. The PEX pipe is inserted into the fitting, and the compression nut is tightened to compress the ring against the pipe, creating a watertight seal.

  5. PEX Expansion Fittings: Expansion fittings are used in PEX-a (PEX type A) systems, which are known for their ability to expand and contract. These fittings require the use of an expansion tool, which expands the PEX pipe before inserting the fitting. As the pipe contracts, it creates a tight connection with the fitting.

  6. PEX Manifolds and Valves: PEX manifolds are distribution points used to control the flow of water in a PEX system. They feature multiple outlets for connecting PEX pipes and often come with integrated shut-off valves for each branch line, allowing for individual control and maintenance.

These are just a few examples of PEX fittings available in the market. It's important to select fittings that are compatible with the specific type of PEX pipe being used (PEX-a, PEX-b, or PEX-c) and to follow manufacturer guidelines for proper installation techniques.