Hayward SP1084P1 Round Adjustable Extension Collar This is a must have

This is a must have if you own a Hayward Navigator or Hayward Pool Vac Ultra

Hayward UHXNEGVT13501 Negative Pressure H350FD Indoor Vent Adapter

Fits Pentair Cristal-Flo high-rate pool and spa sand filters

Base Diameter: 1-5/16" w/Threads

Hayward SP1084P1 Round Adjustable Extension Collar This is a must haveHayward adjustable extension collar is designed to used for SP1084 and SP1085 skimmers. Round Extension Collar for Hayward SP1080 Series Concrete, Gunite, Vinyl and Fiberglass pool Skimmers. Each stackable notched Extension Collar allows for an additional 2 1 2" of vertical height. Features: Adjustable extension collar Fits Hayward Auto Skim series skimmers Comes in round shape