About WSL TRADE WSL TRADE was founded by a professional water system group for wholesaler and retailer on water filtration technology, dealing with all major variety of water filtration system. Our product sells well in the domestic and commercial market, ensures our customers a pure clean, healthy, safe and tasty source of water in an economical, ecological, and time-saving manner, through its wide range of products.One of our goals has been to inform people about the dangers of contaminants in tap water. Many of us are unaware of the possible risks that we could expose ourselves too simply by drinking water we have always thought to be safe, life-giving liquid. With these facts, we do not only sell but also educate customer on the important of cleaning water.