The Robinair Model75275 Econo-Clean Anti-Freeze Recycler filtration unit gives you everything you need to filter out coolant contaminants and reinhibit at the same time.  This unit saves time and money.  There is no need to wait for a hot system to cool down before starting filtration process requires only 30 minutes and there is no used coolant to dispose of.  The filters are already installed.  Check the entire cooling system for leaks while under pressure.