Yes: I have the one similar to Camping World. Bought it at the Goshen rally a couple of years ago.
Just connect the tube, put other end in distilled water bottle and squeeze bulb. Do that about once a month when set up here in FL over the winter and whenever I begin a trip in the summer.
I like the system and hope it will save my batts from getting too dry.
Life is a journey, not a destination.
2005 Georgetown 359ts
Bill & Virginia, Kentucky
Nights camped in 2011...78 , 2012...73,
Nights camped in 2013...123, 2014 ...101