Watts Premier 501026 ZeroWaste Reverse Osmosis Retrofit Kit, Easy to Install RETROFIT KIT: The ZeroWaste Reverse Osmosis Retrofit Kit is a great way to convert your existing Reverse Osmosis system into an efficient water saving device. By adding this kit to your existing Reverse Osmosis system, you can save hundreds of gallons of water every year COMPATIBILITY: The ZeroWaste Reverse Osmosis Retrofit Kit is compatible with all Premier Reverse Osmosis Systems with the exception of the Manifold Style EASY TO INSTALL: It is easy to install on any existing RO system to make it a ZeroWaste RO system. This kit pumps the rinse water into the hot water side of your water supply instead of down the drain. With the use of the supplied 24 volt pump, your hot water supply will accept the rinse water and mix with the hot water REVERSE OSMOSIS RETROFIT KIT: Turn your existing RO in to a 100 percent efficient treatment system. It increases the production of your current RO to fill the tank faster. It will not work with tank-less water heaters or hot water re-circulation pumps and increases membrane production RETROFIT KIT WARRANTY: ZeroWaste Reverse Osmosis Retrofit Kit has 1 year limited warranty. It utilizes reverse osmosis for quality filtration