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Pentair WC37-503P Extension Collar Replacement Sta-Rite U-3 Inground Pool and Spa Skimmer

4.8 (5) Write Review
Free shipping on orders over $29.99

$56.24

$ 27 .35 $27.35

In Stock
  • Extension collar replacement
  • Fits Pentair Sta-Rite U-3 inground pool and spa skimmer
  • Use on vinyl liner skimmers
  • Measures 9-inch length by 5-inch height by 9-inch width


This extension collar is designed to use with Pentair Sta-Rite U-3 inground pool and spa skimmer. Use on vinyl liner skimmers. Measures 9-inch length by 5-inch height by 9-inch width.


Geoff Dortch
Reviewed in the United States on September 7, 2023
works great for my skimmer
DIY Mom
Reviewed in the United States on July 31, 2023
Used for a remodel where we needed that perfect edge around our pool filter. Has a nice crisp fit with the cover we chose. Pool crew didn't bother to think this far. So glad it was available and I got it in time!
Michael D.
Reviewed in the United States on May 19, 2023
I ordered this and it came in fast. I used it to extend my existing skimmer opening so I could concrete around it and bring it to ground level.
Andrew K. Sokol
Reviewed in the United States on September 14, 2021
Needed and extended collar and this product is a perfect fit and just what we needed.
Tony Cola
Reviewed in the United States on June 7, 2017
Excellent product, exactly the correct fit for my 9" Skimmer. Raised my skimmer back to the correct height since our paver installation. Smaller side slipped into skimmer body and larger, flange side mated perfectly with the outside circumference of the skimmer top. They should list exact inside diameter and outside diameter of both sides to help potential buyer, I was reluctant at first but it is a perfect fit and solution.