Hayward SP1070 Series Skimmer Collar Extension (SP1070P) gaskets and FC-9850 reference give this

and FC-9850 reference give this part practical value because DE filter components work best when the replacement matches the original size and internal design closely

The 21053-150-000 is a practical service part when a compatible plumbing system needs a union to restore dependable connection support

This type of part is especially useful when future valve access matters in the plumbing layout

Useful for more consistent maintenance habits

Hayward SP1070 Series Skimmer Collar Extension (SP1070P) gaskets and FC-9850 reference give thisThe Hayward skimmer collar extension is designed for compatible SP1070 Series skimmer applications where added collar height or extension support is needed. A part like this is useful because it helps adapt the skimmer assembly to the installation while supporting cleaner fitment between the skimmer and surrounding surface area. This replacement is especially useful when the original extension is cracked, warped, damaged, or missing, or when service