Transition for metal-plastic pipe PEX-AL-PEX F 20 mm.x 3/4

The PEX-AL-PEX 20 mm × 3/4" F adapter is a detachable compression fitting designed to securely connect Ø20 mm multilayer (metal-plastic) pipe to plumbing and heating components with a 3/4" male thread. This format is commonly used where higher flow capacity is required—such as connecting manifolds and distribution headers, main-line valves, filters, pressure reducers, pump and mixing groups, water heaters, and metering assemblies. The “pipe → thread” transition is compact and technically clean, without extra adapters or additional joints, which helps reduce potential leak points.

The fitting is made of brass with a nickel-plated finish, combining strength with corrosion resistance. Nickel plating protects the surface from oxidation, mechanical wear, and exposure to aggressive environments, making the connector suitable for long-term operation in hot/cold water and heating systems. This is especially important for installations in high-humidity areas—bathrooms, kitchens, technical niches, and manifold cabinets—as well as steam rooms and saunas where operating conditions can be more demanding. The nickel-plated surface also helps the fitting maintain a neat appearance, which is useful for exposed installations and service-accessible locations.

On the pipe side, it uses a compression connection: the Ø20 mm PEX-AL-PEX pipe is secured on the spigot by a compression ring and union nut. No soldering, welding, or press tools are required—typically a standard tool set and an adjustable wrench are enough. The detachable design simplifies maintenance: the joint can be disassembled to replace a valve, inspect the connection, or upgrade a section without fully dismantling the line. For reassembly, it is recommended to check the compression ring condition and replace it if necessary to maintain reliable sealing.

For a dependable installation, proper pipe preparation matters: make a clean square 90° cut, calibrate the pipe end, and deburr/chamfer. Then slide the nut and compression ring onto the pipe, insert the pipe fully into the fitting, and tighten the nut with two wrenches (one holding the fitting body to prevent twisting). Avoid over-tightening, as excessive force may deform the ring or damage the pipe. Connect the 3/4" female thread (F) to the male-threaded component using an appropriate sealing material to ensure long-term leak-tightness.

The adapter is engineered for real operating conditions: -20°C to +90°C working temperature and up to 10 bar nominal pressure. These specifications suit most residential building services systems, including installations near finished surfaces (such as ceramic tiles) and in technical cabinets where reliability and serviceability are essential.

If you need a quality PEX-AL-PEX 20×3/4" F compression adapter to connect multilayer pipe to 3/4" male-threaded components, with a durable brass body and protective nickel plating, this fitting is an optimal solution for water supply and heating systems.