ERA Piping Systems, III PP Compression Fitting , PP Compression 90 Degree ELBOW , PTIII001 , WRAS System: Mechanical Compression Fitting (known as PP compression fittings) is a fitting that connect piping elements which require physical force to develop a seal or produce...nPP pipe is a non-toxic, hygienic, high temperature resistant and recyclable pipe type. It is mainly used in indoor hot and cold water supply systems in buildings, and is also widely used in heating systems.nThe characteristics of PP pipes are non-corrosive, wear-resistant, non-scaling, reduced vibration and noise, and anti-freeze cracking (PP pipes will freeze and crack at low temperatures exceeding -20°C, and will decompose in high-temperature working environments as long as they exceed 70°C. Temperature between -20℃ to 70℃), anti-condensation, low heat loss, simple installation and long service life. There are three connection methods: welding method, edge welding method, and different material connecting method.