To verify the authenticity of AQUA-SCIE products: ①Observe: AQUA-SCIE pipes are packed in black anti-UV packages with the text "Made in Germany" printed on each pipe as the sign of origin in Germany. ② Smell: All AQUA-SCIE products are made from environmentally friendly chemical raw materials from Nordic Europe with a feature of producing no peculiar smell in case of combustion and heating. ③ Ask: The anti-counterfeit label of 2-dimensional code on each pipe can be scanned using a smart phone to verify its authenticity. ④ Cut: AQUA-SCIE has a red copper content of 88%. A typical DN25 pipe has the faucet elbow composed of 7 faucets and a waterproof gasket. The weight of copper is 50.1g. But the counterfeit "AQUA-SCIE" has a brass content of 65%. A typical DN25 pipe has the faucet elbow composed of 5 faucets with no waterproof gasket. The weight of brass is just 47.1g.