Watts Water Quality/Condition M7002 Flow-Pur RV-Pro 10,000 Water Softener Built-in drain line flow restrictor provides a more effective regeneration increasing the capacity by up to 55% Custom designed flow valves allow regeneration without having to connect/disconnect the system Full cradle base keeps tank more secure than cometing open base tanks High flow rates up to 4 GPM with low pressure drop Uses common table salt