Hayward DEX4820BTC Filter Head with Clamp System Replacement for Select Hayward Filters pool-pumps 2-LiterAdd weekly to maintain near

2-LiterAdd weekly to maintain near zero phosphate levels

Dual cartridge elastomeric full facepiece with four strap headband

and True Sight II

Filters out different gases

Original "one moving part" design for years of dependable service - no wheels or gears to replace

Hayward DEX4820BTC Filter Head with Clamp System Replacement for Select Hayward Filters pool-pumps 2-LiterAdd weekly to maintain nearHayward DEX4820BTC Filter Head with Clamp System Replacement for Select Hayward Filters Filter head with clamp system replacement Fits hayward pro grid vertical d e filter models de2420, de3620, de4820, de6020, de7220 Also fits hayward swim clear cartridge filter c2020, c3020, c4020, c5020 Also fits Hayward Skim Master models SP1070, SP1070 NSF Includes clamp system; weight 19 pound