You can get this same filter at walmart cheaper and it works very well. As SouthCo said, you will find a majority of campers will have one hooked up to their TT. I wouldn't hook up water without one
2013 Jayco Jayflight Swift 264BH
2002 Yukon 5.3L Vortex w/tow package
When I die, I want to go peacefully like my grandfather did–in his sleep. Not yelling and screaming like the passengers in his car.