Transition for metal-plastic pipe PEX-AL-PEX F 20 mm.x 1/2

The PEX-AL-PEX 20 mm × 1/2" F adapter is a detachable compression fitting designed to reliably connect Ø20 mm multilayer (metal-plastic) pipe to plumbing and heating components with a 1/2" male thread. It is widely used in cold/hot water supply and heating systems where a leak-tight joint is required without specialized tools. The adapter is well suited for connecting ball valves, manifold outlets, filters, water meters, pressure reducers, mixing assemblies, radiator valves, and other components with a 1/2" threaded connection.

The 20 mm diameter is commonly chosen for house and apartment distribution lines when good flow rate and stable pressure at draw-off points are needed. The 20×1/2" F adapter helps build a compact, logical connection point while avoiding unnecessary couplings and extra adapters. Its detachable design simplifies maintenance: you can remove or replace a component, inspect the joint, or upgrade a section of the system without major pipework dismantling.

The fitting is made of brass with a nickel-plated finish. Brass provides strength and reliable threads, while nickel plating protects against corrosion, mechanical wear, and exposure to aggressive environments. This makes the connector suitable for high-humidity areas such as bathrooms, kitchens, technical niches, and manifold cabinets, as well as for steam rooms and saunas where operating conditions can be more demanding. The nickel-plated surface also helps the fitting maintain a neat appearance—important for exposed installations and accessible mounting zones.

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. Installation requires no welding, soldering, or press tools—typically an adjustable wrench is enough. For maximum reliability, prepare the pipe properly: a clean square 90° cut, calibration, and deburring/chamfering. Then insert the pipe fully and tighten the nut using two wrenches (one to hold the fitting body). Avoid over-tightening, as excessive force may deform the ring or damage the pipe. For the 1/2" threaded side, use appropriate sealing materials selected for your thread type and operating conditions.

The adapter is engineered for stable operation in residential systems: -20°C to +90°C working temperature and up to 10 bar nominal pressure. These ratings make it suitable for most water supply and heating tasks, including installations near finished surfaces (such as ceramic tiles) and in areas where leak protection is critical.

If you need a reliable Ø20 mm multilayer pipe adapter with a 1/2" female thread that is easy to install, corrosion-resistant, and suitable for hot/cold water and heating, this PEX-AL-PEX compression connector is a practical choice for a long-lasting system.