Generic Buna-N O-Ring [1/2" ID] [1/8" CS] (O-391)

Generic Buna-N O-Ring [1/2" ID] [1/8" CS] (O-391) is a replacement O-ring from Generic 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-391 when matching this item to an existing component, owner’s manual, parts diagram, or service record. Key identifiers and configuration details include 1/2" ID, 1/8" CS. 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 Generic 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