Diameter: 6 3/8"
Length: 14.5"
Top and Bottom Hole: 1 15/16"
OEM: Watkins Hot Springs Spas
Watkins: 78373
Pleatco: PWK35B
Unicel: N/A
Filbur: FC-3921
Single filter only
Watkins Hot Spring Spas 50 sq. ft. cartridge
Warranty Coverage: Replacement Filter Cartridges come with a 5 Year Limited Manufacturers Warranty. The manufacturer warrants their filter cartridges against defects on workmanship and materials. This warranty will be void if the filter cartridges become damaged as a result of improper installation or use. Warranty does not cover labour charges, cost of lost water or chemicals, or any other damages that may occur.
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