Bullfrog® Spa Filter Cartridge – Fits A, R, X Series (2013–2016) – part #10-2870

Q: What Bullfrog® spa series use the 10-2870 filter?

A: It’s compatible with A, R, and X series spas built from 2003 to present, except for STIL models.

Q: How much filtration area does this cartridge provide?

A: It offers approximately 35 square feet of pleated media.

Q: What thread type does the bottom have?

A: The bottom has a 2″ SAE coarse threaded (long thread) connection.

Q: What makes this filter different from non-Microban versions?

A: The media is treated with Microban® antimicrobial protection to inhibit the growth of mold, mildew, and bacteria on the filter surface.

Q: How often should I replace the cartridge?

A: Replace annually or sooner if cleaning no longer restores water clarity. Clean regularly (every few weeks) to maintain performance.

Turn off power to the spa and stop all pump operations before servicing the filter.

Remove the filter housing lid or access panel to expose the cartridge.

Twist or pull out the existing filter cartridge and discard (or clean if reusing).

Insert the Bullfrog® 10-2870 cartridge into the housing, aligning threads if present.

Secure the housing lid or panel and ensure it is properly seated.

Turn spa power back on and run the system to confirm proper water circulation.

Rinse or clean the filter regularly (every 2–4 weeks) and replace annually or sooner depending on water quality.