PPR is the abbreviation of tripolypropylene, also known as random copolymer polypropylene tube, using hot welding method, with special welding and cutting tools, with high plasticity. PPR pipe price moderate, stable performance, heat and heat insulation, corrosion resistance, smooth inner wall Without scale, pipe system safe and reliable, impervious to water, service life up to 50 years. But the construction technology requirements are high, the construction needs special tools and professional personnel, to ensure the safety of the system. But how do you distinguish what is the quality of PPR pipe fittings?