AVSC SS 316 Stainless Screws w/ Tool (10-Pack) – Pentair In-Floor | 295314 Cyclone it could be related to

it could be related to this part and the opening on its bottom side where the high-pressure water is shot through

Foot pad replacement kit

They are made from the same high-grade material as the original factory parts

Polaris 3900 Sport / "Trade Grade" TR35P and Quattro Sport Pressure Cleaner In-line Filter Assy

It also gives it the ability to move up and down which actually helps the SandShark move along the surface of the pool

AVSC SS 316 Stainless Screws w/ Tool (10-Pack) – Pentair In-Floor | 295314 Cyclone it could be related toAVSC SS 316 Stainless Screws w Tool (10 Pack) Pentair In Floor Replacement AVSC SS 316 stainless steel screw set with driver tool for Pentair In Floor systems. Corrosion resistant hardware. Features 316 stainless steel for superior corrosion resistance Set of 10 screws for complete component replacement Includes matching driver tool for proper installation Description This AVSC SS 316 screw kit is designed for easy servicing of Pentair In Floor (A&A)