How to select high quality PVC Garden tube？

Generally inexpensive water pipes are also made of PVC material, also known as PVC pipes. There are braided layers, but their service life, appearance, odor, compressive strength, tensile strength and working pressure are obviously different.
The first is the odor, which is emitted by polybrominated diphenyl ethers (PBDEs) containing polyvinyl chloride (PVC) materials. PBDEs is more and more harmful to human and natural environment. It has strong odor, strong fat solubility and great harm to human liver and nervous system. It may cause damage and interference to thyroid endocrine, which may lead to cancer.
Secondly, the anti-pressure effect is poor, the bonding strength is poor, the cold weather is easy to harden, the hand is like a stick, easy to break; although some pipes feel very soft in winter, cold-resistant plasticizer is added to the production of pipes, plasticizer is phthalate ester, which is a chronic toxicity to the human body, easy to cause liver and kidney function decline. Erythrocyte depletion. Less, with mutagenicity and carcinogenicity.