For sale is John Guest 12mm Pipe Inserts Various Pack Sizes Caravan Motorhome Camper Creates a rigid connection when fitting pipework into a john guest fitting for potable liquid or hot water applications John guest pipe inserts play a vital role in providing extra support to pipework, ensuring that the ends of the pipe are kept nice and round, and minimising any loss of shape that can occur when cutting. designed and manufactured in the uk. Features and benefits Enhances sealing for a securer connection Maintains structural integrity of the pipe connection Helps make the pipe more rigid when a side load is applied Suitable for hot and cold water and central heating systems Compatible with soft metal or plastic pipe/tubing Features - Tube od: 12mm Tube id: 9mm Fittings are suitable for the following pressures and temperatures 5/32″ – 5/16″ 4mm – 8mm 3/8″- 1/2″ 10mm – 22m