This is by far the best toilet bowl cleaning system around as it does not leave the cleaner in the toilet tank which can cause the rubber and other items in the toilet tank to rot and start to leak. This system uses the line that feeds water into the bowl and hooks inline. Once inline of the current water hose in the tank it fills the cleaner system container and has another hose that goes out to the normal spot in the tank. All of this installs in less than 5 minutes, and with NO TOOLS!
The best deal I have found on this item that also comes with 2 pouches of the cleaner has been on Amazon and you can pick that up here