John Guest Coupling

The John Guest Straight Coupling is a high-quality push-fit fitting designed to efficiently connect two equal-sized pipes. Ideal for air and pneumatic systems, this connector simplifies the installation process, making it quick, secure, and hassle-free.

• Effortless Installation: The push-fit design enables fast and simple installation, connecting pipes instantly without the need for tools, hot works, or sealing agents. This approach can reduce installation time by up to 50% compared to traditional methods.
• Unique Collet Locking System: Ensures a firm and secure hold on the pipe, maintaining integrity without deforming the pipe or restricting flow. The secure collet cover also prevents accidental disconnection.
• High-Quality Material: Crafted from strong acetal copolymer and featuring a nitrile O-Ring, the fitting offers an airtight connection with superior flow characteristics.
• Versatility and Compatibility: Compatible with various pipe materials including John Guest nylon, powder-coated aluminium, LLDPE tubing, copper, PEXa, and other soft metal pipes.
• Demountable Design: Fittings are fully demountable, which minimizes system downtime during maintenance and allows for easy modification or extension of systems.
• Application Flexibility: Suitable for air, inert gases, and vacuum applications. The fitting is also ideal for potable liquids, being a food-grade fitting.
• Pressure Capability: Designed to handle air and pneumatics piping systems up to 10 bar.
• Made in the UK: All John Guest fittings are manufactured and assembled in the UK, ensuring high-quality standards.

• Product Codes: PM0412E, PM0415E, PM0418E, PM0422E, PM0428E
• Available Sizes: 12mm, 15mm, 18mm, 22mm, 28mm
• Material: Acetal Copolymer with Nitrile O-Ring.
• Temperature Range: Suitable for temperatures from -20°C to +70°C, ideal for various environmental conditions.
• Pressure Rating: Designed to handle air and pneumatics piping systems up to 10 bar.
• Compatibility: Works effectively with nylon, powder-coated aluminium, LLDPE tubing, as well as copper, PEXa, and other soft metal pipes.
• Applications: Optimal for air, inert gases, vacuum applications, and potable liquids.

Installing a John Guest Straight Connector is straightforward and efficient. Follow these steps to ensure a secure and reliable connection:

1. Cutting the Pipe: Ensure the pipe is cut square for a proper fit. This is crucial for the integrity of the connection. Use a John Guest pipe cutter for rigid nylon pipes. For aluminium pipes, utilise aluminium pipe cutters. After cutting, remove any burrs or sharp edges to avoid damaging the O-Ring. This step is important to maintain the quality of the seal.
2. Making the Push-Fit Connection: Push the pipe firmly into the fitting up to the pipe stop. This ensures that the pipe is fully inserted for a secure connection. Make sure the pipe is aligned correctly with the fitting to avoid any leakage or fitting damage.
3. Checking the Connection: After inserting the pipe, pull it slightly to ensure the connection is secure. This test confirms that the fitting is properly engaged. Before using the system, conduct a thorough test to ensure there are no leaks and that all connections are secure.
4. Disconnecting the Fitting: Ensure the system is depressurised before attempting to disconnect. Push the collet towards the fitting to release the pipe. This step is crucial for a smooth disconnection. Carefully remove the pipe from the fitting.

Key Features / Tech Specs:

• Material: Acetal
• Medium: Air
• Working Pressure: 10 bar/145 psi at 23°C
• Working Pressure: 7 bar/101 psi at 70°C
• Working Temperature: -20°C - 70°C

Useful Info:

It is highly recommended that all fittings are pressure tested before use.

Do not use fittings with damaged or rough-edged pipe or tubing.

John Guest recommend using cleaners and sanitising agents that are above ph4 and low in hypochlorite levels

IMPORTANT: The technical data given on this website is for preliminary information purposes only and is published without guarantee. All line drawings are for illustrative purposes only and should not be regarded as wholly accurate in every detail. We reserve the right to withdraw or to alter the specification of any product without notice. For more information, please consult our Terms of Business.

If you require any further information, our excellent customer service team is here to help so please call us on 01794 835835.