How to identify a good PPR tube

1. Uniform texture, fine texture, beautiful color

2. The end surface is flat and round without burrs, and the inner and outer walls are smooth without obvious impurities.

3. The size meets the standard requirements, such as outer diameter and wall thickness.

4. No obvious peculiar smell, especially pungent smell.

5. Tubes that are hard, elastic, and indestructible are fake.

6. No irritating smell and no black smoke when burning.