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while side discharge pumps have an opening located on the side of the wet end
ensure the water is properly balanced with specific focus on the total alkalinity and pH
bottom end cap: 2" male thread/mpt
Prior to treating the hot tub to remove phosphates
Hot Tub Filter Cartridge 20 Sq Ft 1.5" MPT 4CH-20 ProAqua SPA CARTRIDGES while side discharge pumps haveDiameter: 4 5 8 ; length: 6 3 4 Top end cap: molded cone handle, 0" inner diameter; bottom end cap: 1 1 2" male thread mpt, 0" inner diameter Pleat count: 204; filter media: 3 oz reemay 2033; filter area: 20 sq. ft. Get more efficient filtration and better water clarity with Unicel filters Longer time between cleanings; meets oem specifications 20 Sq Ft Filter Cartridge with 1. 5" MPT (40201) Soft Tub, Vita Spa, Master Spa