• Manufacturer Astral 

• Material: Rubber 

The Astral replacement valve/tank O-ring – 720R1750057 will help prevent water from leaking into the valve and tank to help your filter last longer. This 7201R1750057 pool O-ring is designed to be used with the Astral Millennium side-mount sand filter. The rubber construction of the Astral O-ring ensures quality and durability.