O-Rings are essential for leak-free performance. They are made of high-quality rubber that is lightweight and durable. They seal housings keeping the water where it should be. Over time O-Rings deteriorate, so it's always recommended to change all O-Rings once you open the housing. It is recommended to use a silicone lubricant to prevent water leaks.

• 3.5 inches in diameter
• Compatible with most industry standard size 10” filter housings