AGAflex screw-reducing coupling 1 1/4" x 1/2" galvanised

AGAflex screw-reducing coupling 1 1/4" x 1/2" galvanised is a mechanical threaded fitting designed to connect pipes and fittings of different diameters. The coupling provides a reliable metal-to-metal threaded joint between a 1 1/4-inch and a 1/2-inch threaded pipe, finished with galvanisation to improve resistance against corrosion in typical plumbing and heating environments.

Advantages

The galvanised finish offers enhanced corrosion resistance compared with plain steel, extending service life in water, heating and indoor utility installations. Its screw-reducing design ensures a tight, reusable threaded connection without the need for welding or soldering. The coupling is compact and suitable for confined spaces, and being a metal fitting it withstands mechanical stress and temperature variations typical of plumbing and heating systems.

Suitable for

• Joining a 1 1/4" pipe to a 1/2" threaded fitting
• Domestic and commercial plumbing repairs
• Heating system connections and modifications
• General pipe installation where a threaded reduction is required

Key specifications

• Connection type: screw-threaded reduction coupling
• Input diameter: 1 1/4 inches (female/male depending on system orientation)
• Output diameter: 1/2 inch (female/male depending on system orientation)
• Material: steel with galvanised surface finish
• Suitable media: water, heating fluids, non-aggressive liquids and gases in typical plumbing applications
• Operating environment: indoor and protected outdoor installations where galvanised protection is appropriate

How to use

Ensure both mating threads on the pipes or fittings are clean and free of debris or old sealing compound. Hand-start the coupling onto the larger or smaller thread as appropriate, then tighten with a suitable wrench until a secure, leak-tight connection is achieved. Use an appropriate thread sealant or tape on tapered threads if required by the piping standard or local practice. Check the joint under pressure after installation and re-tighten if necessary following recommended torque limits for threaded pipe fittings.

Usage recommendations

Use compatible thread sealants and avoid excessive mechanical stress on the coupling. Do not use in highly corrosive chemical environments not suited to galvanised steel. For connections with dissimilar metals, consider corrosion protection or isolation to prevent galvanic corrosion.