If replacing one suction cover, it is highly recommended that you replace all of them to be compliant. These suction covers are available for replacement of your older suction covers (spa models pre-2009). There is however no guarantee that these suction covers will fit your pre-2009 spa.
3/8" x 1.5" Fender Washer used on the propulsion system in the swim spas. The 3/8" x 1.5" Fender Washer from Master Spa Parts has a thinner body compared to the flat washer and provides an even wider surface area of support for fasteners.