It is great to hear your water now tastes good after the filter. However, if the water you are putting in your RV system tastes fine but it becomes bad tasting because of your RV's water system, then you need to sanitize your RV's system. You don't want to just rely on a filter blocking enough bacteria to give the water an acceptable taste. Rather, you want to remove the bacteria from the equation. Periodic sanitizing of your RV's water system is an important maintenance task.
2015 Wildcat 282 RKX
2011 F350 Lariat, 6.7 L. Diesel, 8 ft., SRW, Reese R20