Pentair Skimmer Extension Collar | U-3 Skimmer | WC37-503P FC1293 Both options give offer a

Both options give offer a sleek

New spa setups (remove phosphates from fill water)

Replacing this element on schedule restores your filter to full OEM flow rate and debris-capture performance

The Unicel FS-2004 is a complete replacement DE filter grid set for 48 square foot diatomaceous earth filter systems

Pentair Skimmer Extension Collar | U-3 Skimmer | WC37-503P FC1293 Both options give offer aThe 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