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We no longer have a retail store for buying and picking up parts.
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CALDERA SPA 100 SQUARE FOOT REPLACEMENT FILTER
WAT1039607
100 Square Foot Filter Used In Watkins Mfg/Caldera Spas. Watkins Number 73722, Unicel C-8399, Pleatco PCD100W, Filbur FC-3965.
Outside Diameter:
7.8750"
Cartridge Length:
16.5000"
Top:
HANDLE
Bottom:
3 1/2 INCH HOLE 