HANXER PWK30 30 sq.ft Spa Filter Cartridge 2-Pack — Trilobal 50-Micron Replacement for Unicel C-6430/Filbur FC-3915 (10½" x 6")

HANXER PWK30 is a 30 sq.ft trilobal-filtration drop-in spa filter cartridge sold as a 2-pack that replaces Unicel C-6430, Filbur FC-3915 and other compatible models.

This pair of HANXER spa filter cartridges is designed to fit common Hot Springs and other spa systems that accept the PWK30/C-6430 family. Each cartridge measures 10 1/2" long with a 6" outside diameter and open 1 15/16" top and bottom; the media uses a trilobal fiber structure and a 50-micron filtration layer to trap fine particles while maintaining reliable flow. Built with reinforced end caps, strong adhesive tape, and internal support frames, the cartridges aim to extend service intervals and simplify routine maintenance.

How does this filter improve my spa water clarity?

The HANXER PWK30 uses a trilobal three-leaf fiber design that increases surface area for particle capture compared with standard pleated media. Combined with a 50-micron layer, it removes fine dust, hair, leaves, sand and sediment to keep water clearer between cleanings. The result is reduced visible debris and fewer cloudy episodes when filters are cleaned regularly.

• Trilobal fibers triple adsorption surface area versus plain fibers.
• 50-micron high-efficiency layer traps fine particles down to sand and sediment size.
• Reinforced structure sustains flow while capturing more debris.

Will these cartridges fit my existing spa model?

HANXER PWK30 cartridges are made to be compatible with multiple OEM part numbers including Unicel C-6430, Filbur FC-3915, Watkins 31489 and several Hot Springs part numbers listed in the product description. Before buying, measure your original filter and compare diameters and open-top/bottom dimensions to ensure a correct fit. Using matching dimensions prevents leaks and circulation issues.

• Length: 10 1/2"; outside diameter: 6"; top/bottom opening: 1 15/16".
• Cross-references: PWK30, C-6430, FC-3915, Watkins 31489, 60301, and listed part numbers.
• Confirm physical measurements on your current cartridge prior to purchase.

How do I clean and maintain these filter cartridges?

Rinse the cartridges regularly with clean water to remove trapped debris and extend service life; do not backwash these units, as that can crack the media and shorten life. For deeper cleaning, use a filter cleaner solution according to the cleaner manufacturer’s instructions, then rinse thoroughly and allow to dry before reinstalling. Regular inspection helps you decide when replacement is needed.

• Rinse frequently with low-pressure water to remove surface debris.
• Avoid backwashing—this filter must not be backwashed.
• Use a spa-safe filter cleaner for periodic deep cleaning, then rinse and dry.

What construction and safety features does this filter include?

HANXER cartridges combine thickened polyester fabric, reinforced anti-breakage end caps, high-strength adhesive tape and an internal support frame to resist collapse and tearing. The filters are tested by IAPMO to meet NSF safety standards for long-term water contact, reducing the risk of harmful material leaching. A six-month after-sales guarantee covers quality-related issues and ensures support if problems arise.

• Durable polyester media and reinforced end caps for longer life.
• IAPMO-tested to NSF safety standards for water-contact components.
• Six-month return/exchange policy and technical support.

Who is this for: This 2-pack of HANXER PWK30 spa filters is ideal for spa and hot tub owners who need a direct-drop replacement for PWK30/C-6430-compatible systems and want improved particle capture without sacrificing flow. Choose these cartridges if you value reinforced construction, a finer 50-micron filtration layer, and compatibility with multiple OEM part numbers. They suit homeowners performing routine maintenance, small-property managers, and anyone seeking an affordable way to keep spa water clearer between deep cleanings.