Our first and foremost commitment is total quality assurance, and a substantial portion of our efforts is aimed in this direction. The mechanical equipment used for the manufacture of Aqua-plus pipes and fittings assures quality of products at the utmost degree. Apart from the usual mechanical equipment for pipe manufacture, Interplast production lines are equipped with the equipment listed below, ensuring that the consumer receives a final product of the highest quality.

• Raw material dehumidifier. In this way, raw materials that easily absorb humidity are stabilized. Thus, we eliminate the problem of altered dimensions, which is a quite frequent phenomenon in plastic pipes.

• Automatic correction of screw turns. Thus we achieve steady weight per meter in the manufactured pipe, which means steady dimensions. This is the first part of the dimensional stability of the pipe.

• Automatic correction of pipe wall thickness. A system where we define the desired limits of wall thickness, which are then regulated automatically by means of the extruder. This is the second part of the dimensional stability of the pipe.

• Checking of outer diameter by laser. This is the third and final part of electronic testing. The absolute values of the LASER SCANNER ensure proper fitting of the pipe to the pipe fitting during heat welding.

In addition to all the above which are a prerequisite for the production of pipes to be used in hot and cold water installations, the following aspects ensure the high quality of Aqua-plus pipes.

• First-rate mechanical equipment specially designed for PP-R pipes and fittings, in order to prevent failures in homogenization.

• Fitting test on the brass insert for threaded Aqua-plus fittings (extensions, adaptors). In this way we guarantee proper fit between two components of our own manufacture.

• Dimensional checking of pipes by the production line operator. The outer diameter is checked by means of a strap gauge, wall thickness and oval of pipe by means of an electronic thickness gauge. The specimens measured are kept for final checking by the production manager and the technical director, who issue the distribution order after completion of laboratory testing. All measurements are registered in the ISO quality assurance system, which is updated daily.

• Checking of adhesion between pipe and fitting with use of the thermal welding machine.