Diameter: 6 3/8"

Length: 11 15/16"

Top and Bottom Hole: 3"

OEM: Watkins Hot Springs Spas

Watkins: 31115

Pleatco: PWK40

Unicel: C-6600

Filbur: FC-3930

Single filter only

Watkins Hot Spring Spas 40 sq. ft. cartridge

Warranty Coverage: Replacement Filter Cartridges come with a 30 Day Limited Manufacturers Warranty. The manufacturer of these filter cartridges 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.

Start a Warranty Claim:To begin a claim please email customerservice@poolsuppliescanada.ca with a photo showing the defect(s)/damage to your Replacement Filter Cartridge and include a brief explanation of what occurred.