Jointing of PP-R pipes and fittings  is done using  a  simple  process  that  uses  a  thermal welding system to form a strong  watertight  joint.  The   welding  machine  melts  the  inner surface of the fitting and the outer surface of the pipe. When these are pushed together they fuse to form a single homogenous joint.

The following steps describe the various stages of the welding process:

• Prepare the welding machine by fitting it with the correct welding dies for the pipe and fitting  diameters  to  be  welded.  Connect the plug to the 220 V power supply socket and wait until the machine reaches the working temperature (260 °C).+

• Cut the pipe at right angles to the pipe axis using a suitable pipe cutter.

• Peel off the outer PP-R and  All  layers  completely  using the appropriate equipment. Push the end of the composite pipe into the guide of  the  peeling  tool.  Peel the PP-R/Al composite layer to the stop of the peeling tool.  It  is  not necessary to mark the welding depth as the stop of the peeling tool sets the correct welding depth.

• Without turning, insert the end of the  pipe  into  the  heating sleeve up to the marked welding depth, at the same  time  and  without  turning  fully  slide  the fitting onto the other side of the heating tool up to the stop.

• Leave the  pipe  and  fitting  on  the  heating  tool  until the heating time has elapsed.

• At the  end of  the  heating time, remove the pipe and fitting from the heating tool and push them immediately  and  firmly  into  each  other  up  to  the  mark indicating the welding depth. At  this  point  the  depth  mark  will be covered with the welding bead. During  this  process,  do  not  rotate  the  pipe  and  fitting  relative  to   each   other.

• Allow the joint to cool fully before using.