Generic Buna-N O-Ring [AS568 #444] (O-3) is a replacement O-ring from Multiple Manufacturers for compatible pool, spa, bath, pump, valve, filter, or equipment assemblies. O-rings are small but critical sealing parts that help prevent leaks, air intrusion, and loss of pressure when installed in the correct groove or sealing surface. Use part number O-3 when matching this item to an existing component, owner’s manual, parts diagram, or service record. Key identifiers and configuration details include AS568 #444. This item is a practical replacement for routine service when the original seal has flattened, cracked, stretched, or become brittle.For best results, compare the inside diameter, cross-section, material callout, and application location before ordering. Clean the sealing area and inspect mating surfaces before installation, and use only a lubricant suitable for pool and spa seals when lubrication is required. Genuine or listed Multiple Manufacturers replacement option for O-Rings applications Match inside diameter, cross-section, material type, and sealing location before installation Useful for repair, rebuild, routine maintenance, or replacement service Compare size, voltage, color, connection type, and model details before ordering Professional installation is recommended whenever electrical, gas, pressure, or code-sensitive work is involved