Filters to fit Hotspring hot tubs:
Our filter cartridges are premium quality units made by major manufacturers in the USA, such as Pleatco, Unicel and others. Do check the reference numbers on the end-caps and the dimensions, as follows here:
PWK 30 - Watkins - Outer Dia. 6" (152mm) x length 9" (228mm) with two x 1 15/16" (50mm) end holes.
PWK 45-N Watkins - Outer Dia. 8 1/2" (216mm) x length 10 1/2"(267mm) with 2 x 3" (76mm) end holes - as used in model Classic Sovereign.
PWK 25 Watkins - Outer Dia. 6 1/4" (159mm) x 11 7/8"(302mm) with two x 3" (76mm) end holes, as used in the Jetsetter.
PWK 40 Watkins - Outer Dia. 6 1/4" (159mm) x 11 7/8"(302mm) with two x 3" (76mm) end holes, as used in the Prodigy model.
PWK 45-0 Watkins - Outer Dia. 8 1/2" (216mm) x 12 1/2"(318mm) with two x 2" (51mm) end holes, as used in pre '86 models.
PWK 65 Outer Diameter 8 1/2" and length 10 1/2", with 3" holes at each end, as used in Tiger River models. Unicel Reference C-8465
