Fully assembled Control Zone Kits provide all the components necessary for on/off control, filtration, and pressure regulation in a single package, making them simple to order and easy to install. Residential/Light Commercial low flow uses the innovative PR Filter to combine the filter and pressure regulator into one unit. The PR Filter eliminates a separate component to help avoid leaks either during installation or over the life of the kit.The reliable Control Zone Kit includes the low flow valve, the only valve on the market that can handle low flows (below 3 gpm) without weeping.