The end plug will seal off the end of 19mm polytube and can be removed at a later time if you wish to extend the line.
Secure with CT23 tube clips.
Philmac static fittings have been designed to suit Low Density Polyethylene (LDPE) pipe with an expected maximum pressure of 300 kPa. The metric sizes referred to from 6 to 32 mm are nominal inside diameter. The actual inside diameters are imperial sizes; 1 /4” (6 mm), 3 /8” (10 mm), 1 /2” (13 mm), 5 /8” (16 mm), 3 /4” (19 mm), 1” (25 mm) and 11 /4” (32 mm).