GreenTech Enviromental PW2 PureWash Pro Eco-Friendly Laundry System Features: The technology behind the pureWash was developed for hospitals over 20 years ago because laundry detergents were promoting germs, leaving behind harmful chemicals that cause irritation and infection, polluting the air, clogging drains, and reducing the life of their linens. With pureWash, you will no longer be plagued with: expensive laundry detergents and softeners, drain clogs, septic clogs, water pollution, color fading, laundry stiffness, having to separate colors, air pollution, bacteria, skin infections, chemical odors or the need for hot water.