WATERSTICKS are uniquely designed affordable portable water softeners for your RV, carpet cleaning machine or any other use requiring soft water. WATERSTICKS portable water softeners are made of PVC (strong, durable and inexpensive) instead of expensive SPUN FIBERGLASS which keeps their cost low. They are designed to soften your water to remove minerals like calcium, magnesium and iron. WATERSTICKS are easily hooked up between two sections of garden hose (the SHOWER WATERSTICK installs in place of your existing shower head). When the WATERSTICKS stop doing their job, YOU can easily regenerate them with plain table salt! (or POTASSIUM CHLORIDE for persons on a low sodium diet)No expensive Chemicals, Filters, or Cartridges to replace! The High Capacity CAR WASHING DEIONIZER / SOFTENER attaches to the end of your water hose and is designed for washing cars,boats, motorcycles, airplanes and RV's (recreational vehicles) with pure deionized water. It provides SPOT FREE / TOWEL FREE vehicle rinsing. (The HIGH CAPACITY CAR WASHING DEIONIZER / SOFTENER must have it's resin replaced when exhausted)! Unlike conventional water softeners with spun fiberglass tanks that must stand upright to avoid losing their resin beads (contaminating RV water tanks, heaters and lines), WATERSTICKS can be used in any position, in either direction and accidental water back flow can not cause any damage to your water system.