OnCore Filtration - Watkins Hot Spring Spas Premium WTK810C 2P Filter Upgrade

Intro

Upgrade your Watkins Hot Spring Spas Premium WTK810C 2P filter with OnCore Filtration’s USA-made replacement. This cartridge replaces PWK45N and is built for a precise, snug fit with 8 1/2" diameter and 10 1/2" length, plus 3" top and bottom holes. Expect enhanced filtration efficiency and longer filter life for clearer spa water.

List of Features

• Dimensions & compatibility: 8 1/2" diameter, 10 1/2" length with 3" top/bottom holes for precise fit.
• Made in the USA: Proudly crafted with American quality and precision for dependable performance.
• Strong, virgin cores: Injection-molded cores from 100% virgin ABS or PP provide rigidity and longevity.
• Rugged construction: Point-bonded design ensures even loading and efficient filtration.
• Break-resistant bands: Strategically placed bands support media and maintain pleat spacing during use.
• Symmetric core openings: Promote even flow and consistent filtration across the cartridge.
• Robust end caps: Urethane system resists chlorine and mildew for longer life.
• Compatibility & replacements: Replaces PWK65, C-8465, FC-3960 for broad spa model compatibility.
• Quick identification: OnCore part number aids fast ordering and replacement.

Final Thoughts

With its precise fit, rugged build, and American-made quality, this filter upgrade helps maintain clearer spa water, extend equipment life, and reduce maintenance time. Add to cart today to refresh your filtration and enjoy pristine, relaxing soaks tomorrow.

• Pleatco PWK65 (and PWK65-M) 

• Filbur FC-3960 (and FC-3960 M) 

• Watkins 31114 

• Other OEM/reference numbers: 71827, 71828, 80651, 16506, XLS-810

• Compatible spa brands: Hot Spring, Caldera, Tiger River; many models within these use this size filter.