Pretty simple in concept, right? But when you put this thing to use, it leaks, has a difficult time getting a draw, and then just kinda falls apart. The tubing is stiff and cheap, too. Note that we have no water filter system in our RV, so that was not an issue. Bottom line, stay away from this Chinese junk and the other brands that use the same item just in a different color. I ended up buying a small 12VDC pump which worked fine. A RV friend of ours bought a small pump that attaches to his power screwdriver, a pretty neat solution (literally).Camco makes some unique stuff for RVs, but wow, the quality variation between products is stunning.