On The Go OTG4-DBLSOFT-Portable 16,000 Grain RV Water Softener The Double Standard Softener & Conditioner produces twice the gallons compared to the standard model and is the largest compact RV softener on the market. Built for the owner of any RV/Marine model, this 16,000 grain unit is a perfect fit and supplies approx. 40% more soft water than any other unit on the market. It simply regenerates with 2 boxes of common table salt in less than 30 minutes and provides the owner with soft water up to 1600 gallons or up to 40 days. Its compact, space-saver design allows it to be installed in the tightest places. It will allow high flow rates with very low pressure drop. Its unique features includes easy to carry handle on top, large mouth opening for easy salt addition, high grade premium resin, 360 degree swivel for easy connection of the inlet hose, travel friendly option of cap & plug to prevent leakage and is built for quick & simple regeneration. It utilizes a standard garden hose connection between park faucet and your RV/Marine, requires NO tools or electricity and its compact design 22H x 9.50dia. can be easily stored in your storage bay or dock side locker.