Category Selling: Water Purification Category Selling, Services Sales Ideas Paul Weyland explains how to sell water purification systems. Related LBS Videos:Category Selling: Home RenovationCategory Selling: InsuranceCategory Selling: RoofingCategory Selling: DoctorsCategory Selling: Clothing StoresCategory Selling: Child CareCategory Selling: Computer Repair & Digital SecurityCategory Selling: Bars & Night ClubsCategory Selling: FlooringCategory Selling: Recreational Vehicles