Use the Dual Bed Standard Deionizer for all spotfree applications. No more hand drying or expensive 3rd party cleaning of your RV. This unit will produce 2 1/2 TIMES MORE WATER AND WILL REDUCE YOUR OPERATING COST BY APPROX. 50% compared to the mixed bed system. Dissolved solids are the culprit causing water spotting after rinsing your RV. The deionizer [DI] uses ion exchange technology that will remove all the solids from the water source resulting in mineral free water that leaves no spotting after rinsing a clean RV. The unit will produce approximately 505 gallons* of water good for 101 auto rinses or 17 class A RV rinses with a TDS of 250 at 2 GMP before recharging is necessary. Recharging is easy and fast using our resin refill kits. The compact space-saver design fits a very small footprint of 8” x 20” which includes two tanks each weighing only 18lbs and each measuring 22” h X 6.75” dia.. The unit contains 1/4 cu ft of high grade virgin premium deionization resins. Its unique features includes easy to carry handle on top, high grade premium virgin resin, and travel friendly option of a cap and plug for storage. Works great in your drive-way & or on the road on your auto, big rig RV and even on house windows. Unit is easy to transport and hook up. It comes complete with a ft. hose, polypropylene cam lever quick between tank set-up and a cap and plug for travel plus an easy-to-read handheld digital TDS meter with automatic temperature compensation. TDS meter lets you know when to recharge the deionizer. ELIMINATE SPOTTING AND ALL THE HASSLES AND HEADACHES! We recommend not drinking DI water. Shipping is reimbursed/paid for damaged or defective products, all other returns are paid for by the shipper. Product need to be unused with all accessories. We will inspect the item upon arrival and process the refund. A restocking fee may be deducted.