Chryseos Spa Filter C-4950

If you need a direct replacement for a hot tub filter, matching the part number and physical dimensions matters more than choosing a filter that merely looks similar. This Chryseos two-pack is listed for several filter references and J-series tubs, with measurements that give you a practical way to check fit before ordering.

Its main advantage is the specific compatibility list, the tradeoff is that those references do not make it a universal replacement. Match your current filter’s size and open ends as well as its part number.

Technical details

The package is identified as a two-pack. Each filter is listed with a 50 sq. ft. filtration area and these dimensions:

• Length: 13 5/16 inches
• Outer diameter: 4-15/16 inches
• Top hole: 2 1/8 inches, open
• Bottom hole: 2 1/8 inches, open

Those measurements are useful when you have the old filter on hand: compare its length, width, and end openings before replacing it. A part-number match is helpful, but checking the physical fit can catch differences that a model name alone may not resolve. The listing describes the filter as easy to clean with proper maintenance, but does not give a cleaning schedule or a service-life estimate.

Compatibility

The listed references include PRB50-IN, C-4950, Guardian 413-212-02, 817-5000, R173434, FC-2390, Aladdin 15002, 03FIL1600, 17-2380, 3FIL1600, 06-0012-12, and 6540-471. J210, J220, J235, J245, and J275 are also named. These are compatibility references, not claims that Chryseos is made by or affiliated with the other brands, the listing identifies Chryseos as an independent brand.

A solid pick if one of those references matches your existing filter and the measurements line up. If you are replacing a filter without its label, use the dimensions and open-end design to narrow down the match instead of relying on appearance alone.

Usage tips

Before installation, remove the old filter and compare it side by side with the replacement. Check both open holes and the outside diameter, not just the overall length. For example, if you are doing routine spa maintenance and have the old cartridge beside the tub, a quick check of the two openings can help avoid fitting a replacement with the wrong end style. Follow the cleaning and replacement guidance for your spa, the product details do not specify a maintenance interval.

The two-pack is useful when you want a spare ready for a later change, while a single replacement may suit someone who only needs one cartridge now. Not the best choice if your filter uses different dimensions, closed ends, or a part number absent from the compatibility list. The listing does not identify a specific spa brand for every J-series reference, so verify your existing cartridge rather than assuming every similarly named tub fits.

Questions before you buy

How many filters are included? The product name specifies a two-pack.

Are both ends open? Yes. The listed top and bottom openings are both 2 1/8 inches and open.

Is PRB50-IN listed as compatible? Yes, it appears in the compatibility information. Check the dimensions of your current filter as well.

Is it worth it?

This replacement is most compelling when you can confirm a listed reference and matching dimensions, especially if having a second cartridge on hand is useful. Its stated measurements and compatibility list make the fit easier to assess than a loosely specified filter, but they cannot settle the question if your old cartridge differs or its part number is unknown. Choose it when those checks agree, look for a different replacement when the end style, size, or reference does not match.