The John Guest 1/2" Pipe Insert is suitable for 1/2" tubing, with a 1/2" outer diameter (OD) and 3/8" inner diameter (ID). Creates a rigid connection for fitting pipework into a John Guest fitting for both potable liquid or hot water applications. John Guest pipe inserts provide extra support to pipework, ensuring that the ends of the pipe rigid and open, minimising any loss of shape that can occur when cutting. Used for both hot or cold pipes, the John Guest 1/2" pipe Insert prevents joints from leaking and keeps plumbed systems rigid to increase longevity. Features Instant push-fit connection and leak tight seal Connect, disconnect and reconnect in seconds without tools No scale build up improves performance and equipment lifespan Non-toxic food grade material Superior flow characteristics Suitable for soft metal or plastic tubes Designed and manufactured in the UK John Guest fittings are commonly used with water dispensers and coolers, hot brewing appliances, beverage vending machines, ice makers and beer dispensers, ensuring fresh, great tasting drinks every time.