... factory in this industry, our products of PPR valve, pipe, and fittings,etc, is more than 15 years. All ... Standard: GB/T13663-2000 Certification: ISO9001,ISO14001,OHSAS18001 Applications: water supply, industrial liquids transportation and sewage treatment Advantages:Non-toxic: no ... result in lower pressure loss and higher volume than metal pipe Longevity: more than 50 years under proper use Recycled ...