... Sanitary, non-toxic, no heavy metal additives, directly apply to the water supply system.2. Corrosion resistant, not scaling, no rust, ... liquid medicine.5. Solar heating and cooling equipment system.6. Piping system for air compression.7. Caliduct, floor and wall ... heating equipment.8. Piping system for other industries and agricultureMaterial:PPR (Hyosung,Borealis,Yanshan) ...