Home / HVAC / Water Softener O-Ring 7170319 Water Softener O-Ring 7170319$9.39 Price may not be up-to-date. In Stock View Product Part Number: 7170319 Brand: ECODYNE WATER SYSTEMS INC Seller: Sears PartsDirect Category: HVAC Not Returnable Description This O-ring (part number 7170319) is for water softeners. Unplug the water softener before installing this part. Wear work gloves to protect your hands.