Horse Waterers300 Series 700 Series 900 Series Accessories Horse Feeders400 Series 500 Series Livestock Waterers300 Series 700 Series Accessories Dog EquipmentDog Waterers Dog Feeders Water Bucket Heaters Water Bucket Heater Features Service & SupportPurchase Parts Track Shipments Service Manuals Tech Support Nelson Mfg. Co.Blog Contact Salesperson Warranty Information Free Catalog & Prices Nelson Service & Support Nelson 700 Series (All Models 700 & 760) Horse & Livestock Waterers Introduction How Nelson Waterers Work Cleaning Drinking Bowl Setting Water Level Adjusting Control Valve Cleaning Water Filter Pre-Winter Inspection Dripping & Overflow Freeze-up Testing Heater Testing Thermostat Replacing Heater & Thermostat