Pentair Skimmer Extension Collar | U-3 Skimmer | WC37-503P FC1293 This cover seats over the

This cover seats over the skimmer throat to protect the basket and internal components from debris

and American Products 48 sq

A cracked or warped basket allows particulate to bypass this first line of protection

When fitting the replacement dome head

Pentair Skimmer Extension Collar | U-3 Skimmer | WC37-503P FC1293 This cover seats over theThe Pentair Skimmer Extension Collar (WC37 503P) is the OEM replacement collar for the Pentair U 3 Skimmer series, designed specifically for vinyl liner pool installations. The extension collar raises the skimmer body to the correct height relative to the vinyl liner surface, ensuring the weir door operates at the proper water level and the skimmer face plate seats flush against the liner. When the collar is cracked, warped, or missing, the skimmer