The RV swap kit includes the extra parts and fittings that enable the quick install required to move the filter system between home and RV camper or boat.
You will find an extra dedicated faucet, cut off valves and fittings that remain in the second install location to accommodate a plug n play installation.
What value, you might ask, would a swap install provide. Obviously, 1 set of filters is cheaper than 2, but that is not the best value. Depending on your climate, removing the filter set during freeze threat is much preferred to winterizing. Furthermore, water filters improve with use (up to a point) and idle carbon filters can grow harmful bacteria. We advise replacement of idle filters rather than flushing. A replacement filter set is $49 + shipping https://www.wholesalewatercooler.com/product/i-style-water-filter-set-of-4-fits-coolers-with-inline-filters/