John Guest tube insert for use with 12mm semi-rigid tube in hot and cold water systems in campervans, motorhomes, caravans, and boats.
These inserts support and strengthen the section of tube that sits inside the push fit fitting, ensuring that a water-tight seal is maintained, and are especially recommended for use in hot water systems where the tube becomes softer as it warms up.
Simply push them fully into the end of the tube, then insert the tube into the fitting as normal.
Made from non toxic, food grade materials, safe for use with drinking water.
