The appearance of nylon joint return products is smaller than that of nylon joint products. (Don't look at the color of the product brightness brightener, put more white light on the product, it is not a return material!); the thread wall of the nylon joint return product is thinner than that of the nylon joint product; the nylon joint return product has a slightly pungent smell, especially Open after sealing and packaging, the smell will be stronger; most of the nylon joint return products have no gasket by default; the service life is different, the return products will be weathered after about 2-3 years of use, and the nylon joint products can be used for about 3-6 years. It will be weathered; the return product is easy to break due to the excessive force on the threaded wall. The raw material product of nylon joint is more flexible than the return product, and the thread wall is thicker than the return material, so it will not break normally (unless it exceeds the force range of the product itself).
