Hot Tub Filter Cartridge 20 Sq Ft 1.5" MPT 4CH-20 ProAqua SPA CARTRIDGES while side discharge pumps have

while side discharge pumps have an opening located on the side of the wet end

relieve headaches

Micro Massage Jet Assembly for Spas 1 '' Water x 1' Air

bottom end cap: 2" male thread/mpt

Waterway Plastics Skim Filter) (C-4405)

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