Pentair Skimmer Extension Collar | U-3 Skimmer | WC37-503P Free-Standing Fountains Eliminates 1

Eliminates 1

Important: Before starting the metal stain removal or water discoloration process (step 4)

maintaining the sealed fluid path that delivers suction from the pool's circulation system to the cleaner head

4-water guns for extreme water fun

Pentair Skimmer Extension Collar | U-3 Skimmer | WC37-503P Free-Standing Fountains Eliminates 1The 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