Everyone uses a drinking water hose. Still a long run from tap to coach can put some plastic and taste into the water. We try to park close as possible to tap and coil any unnecessary hose under the coach. Have two or three short hoses and medium length and long hose.
Some put a half, of a four inch pvc pipe, over the top, to shield from sun.
Final filter is inside the bay.
Run the inside, tap for a minute to clear any possible taste etc from the water.
With the drinking water hose and filter(s) we have always had good tasting water.