John Guest tubing provides the benefits of a wide range of temperature and pressure suitability, broad chemical compatibility and is made from non contaminating materials. LLDPE is more robust than traditional low or medium density polyethylene and is recommended for use with cold and intermittent hot water applications such as water purification, water conditioners, ice makers and misting systems. John Guest tubing is made from FDA approved materials and is NSF International certified. RO-MAN provide a complete range of accessories and component spares for all your Reverse Osmosis needs. We stock flow restrictors, clips, brackets, o-rings, housings, John Guest and white fittings for tube.