These Brass Wingback Elbows are designed to allow the user to join, modify or extend a malleable/galvanised from/to plastic piping. Manufactured from brass with a durable rubber O-ring, the product is suited for use with John Guest's push-fit technology ststem. Features and Benefits Push-fit technology makes the product quick and easy to install as well as move around if needed Allows for a quick disconnection without the need for tools to reduce downtime Quick push-fit system makes a system easy to alter or extend Manufactured from durable brass which is also resistant to corrosion for overall product longevity Push-fit system makes for reduced maintenance and installation times Typical Applications Plumbing Engineering Notes Working Temperature Range Minimum Working Temperature -20C Maximum Working Temperature +70C Working Pressure Temperature: +23C. Pressure: 10bar Temperature: +70C. Pressure: 7bar Tolerances Size: 12mm to 28mm OD. Tolerance: +0.05 to -0.10mm OD