This Formula 420 cleaner sets industry standards, and is the best seller on the market for a reason. It does the work so you don't have to, and it does it quickly. A one minute soak is all you need for this formula to do its magic. The AbrasivAction Technology in Formula 420 has made it the number one choice our customers. With Formula 420, you get to spend more time getting your pipe dirty, and less time cleaning it.