... strength, Simple installation, safty how to use the PPR pipe wleder:1.vertically cut the pipe with pipe cutter,the cut should be smooth, no ... temperture is light, at the same time; inset the pipe and the fitting into the hot-melting machine to the marked part without turing.5 ... of heating, put off the pipe and fitting and quickly insert the pipe into the fitting to the fixed length without turning PPR ...