About This

• [The Pro-Grade Choice for Viking & Bullfrog] Specifically precision-engineered for the high-performance filtration systems of Viking Spas, Bullfrog, Master Spas, Vita, and American Spas. This matching 2-Pack set provides a professional-grade full system refresh for Waterway (817-0050) and Custom Molded Products (CMP) skimmers.
• [Verified OEM & Extended Cross-Ref] A high-performance replacement for Pleatco PWW50P3, Unicel 6CH-940, and Filbur FC-0359. Fully cross-compatible with 817-0050, 03FIL1400, 25252, 378902, HTF0245RT, and Darlly 60401. Engineered to meet or exceed OEM standards across multiple spa brands.
• [1-1/2" SAE External Thread | NOT PWW50P4] Dimensions: 8-1/4" L | 6" OD | Top: Circular Handle | Bottom: 1-1/2" SAE Coarse Male Thread. MUST VERIFY: This filter has an external thread (Approx. 1.8" OD). It is NOT compatible with the PWW50P4 (Fine/Long Thread). Please double-check your bottom connection to ensure a precise, leak-free fit before ordering.
• [Advanced 3 oz Pro-Grade Media] Our Pro Series is powered by premium triangular Trilobal fibers with integrated Dirt-Locking technology, capturing fine debris and contaminants down to 10 microns. This high-density 3 oz advanced media provides significantly more surface area than standard filters, maintaining a powerful "Balanced-Flow" that ensures superior clarity while protecting your pump from strain.
• [Non-Clumping Structural Integrity] Built for durability, our filters feature a reinforced center core and chlorine-resistant end caps to prevent cracking under high pressure. The rigid anti-collapse structure prevents pleats from "bunching," making the rinsing process 50% easier and extending the professional-grade service life to 12–24 months per set. Note: Do not backwash; rinse only.