PentairQuad 100 Filter Cartridge - 25 Square Feet gallons-per-day_50-74 It is used for Quaternary

It is used for Quaternary Ammonium Compound (QAC) and Polyquat testing in Taylor Kits

This is a Schedule 80 One-Piece Flange with a 2-1/2 inch threaded female connection

heavy-gauge 316 stainless steel rim

This is a Drop Test Bromine FAS-DPD 2 ounce Test Kit (1 drop equals 0

PentairQuad 100 Filter Cartridge - 25 Square Feet gallons-per-day_50-74 It is used for QuaternaryThe Pentair 178656 Cartridge Filter Element for Quad DE and EasyClean EC90 Filters has a media area of 25 Square Feet and is made of superior reinforced polyester pleated material with polyurethane end caps. Pentair reusable cartridge filter elements provide a high degree of water clarity and longer filter cycles. To maintain your pool water cleanliness and clarity, Pentair genuine replacement cartridge elements are the number one choice in cartridge