Pair of John Guest Speedfit NC471 15mm x 5/8″ Metric to Imperial Push-Fit Conversion Connectors

Features

This 15mm to 5/8″ conversion connector provides a simple push-fit connection between modern metric pipework and older imperial-sized copper pipe.

• Genuine John Guest Speedfit NC471 conversion connectors.
• Complete pair of two metric-to-imperial push-fit adaptors.
• Connects 15mm metric pipe to 5/8″ imperial pipe (15.88mm outside diameter).
• Two different sized push-fit connections on each adaptor.
• Suitable for copper pipe and JG Speedfit PEX and PB barrier pipe (with appropriate inserts).
• Push-fit installation requires no soldering, glue or specialist plumbing tools.
• Grip & Seal technology combines stainless steel teeth with an EPDM O-ring to create a secure connection.
• Quick and easy to install and disconnect without tools.
• Suitable for domestic hot and cold water supplies.
• Ideal for adapting older imperial pipework when carrying out plumbing alterations or repairs.

Technical Specifications

• Quantity: 1 pair (2 complete connectors)
• Brand: John Guest Speedfit
• Manufacturer Part Number: NC471
• Material: Polysulphone plastic body
• Metric Connection: 15mm push-fit
• Imperial Connection: 5/8″ outside diameter (15.88mm) push-fit
• Connection Type: Push-fit to push-fit
• 15mm Collet: Acetal copolymer with stainless steel teeth
• 5/8″ Collet: Acetal copolymer with stainless steel teeth
• Seal: EPDM O-ring
• Application: Domestic hot and cold water systems
• Pipe Compatibility: Copper, JG Speedfit PEX and PB barrier pipe
• Plastic Pipe: Appropriate pipe inserts required
• Installation: Tool-free, flame-free push-fit connection
• Heating Compatibility: Not suitable for central heating systems

Details

Connecting older imperial pipework to modern metric plumbing can present a challenge, particularly when standard fittings cannot accommodate the different pipe sizes. These genuine John Guest Speedfit NC471 conversion connectors provide a straightforward solution by joining 15mm metric pipe to 5/8″ imperial pipe.

Each adaptor features two push-fit ends, with one side accepting 15mm pipe and the other accepting 5/8″ imperial pipe. Furthermore, John Guest’s Grip & Seal technology uses stainless steel gripping teeth and an EPDM O-ring to create a secure connection.

The connectors work with copper pipe and JG Speedfit PEX or PB barrier pipe. However, when connecting plastic pipe, you must use the appropriate pipe inserts to support the pipe correctly. Both ends also allow quick installation and disconnection without soldering, flux or specialist tools.

Important: The 5/8″ measurement refers to the outside diameter of the imperial pipe (15.88mm). The manufacturer’s technical documentation also describes this pipe size by its 1/2″ internal diameter. Therefore, check the outside diameter of your existing pipe before ordering to ensure compatibility.

Please note: These conversion connectors suit domestic hot and cold water supplies only. They are not suitable for central heating systems.

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