Hot Tub Things® Flat Spa Filters 4-Pack for Bullfrog® Spas Simplicity® 10-00814
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Key Features & Benefits
Fits M, Swim & A Series (2023+)
Drop-in replacement for Bullfrog's Simplicity flat filter compartment — no cutting or adapters needed.
Flat, Plastic-Free Design
Engineered for seamless compatibility with original mounting points for secure placement.Matches Bullfrog's newer flat-filter format, which uses pleated media instead of a rigid plastic core.
Built for Monthly Rotation
A 4-pack keeps a spare ready while another filter dries or gets deep-cleaned, matching Bullfrog's recommended monthly cycle.
Cost-Effective Alternative
Hot Tub Things' own compatible version of the 10-00814 filter, priced below the Bullfrog-branded cartridge.
Protects Pump & Heater
Clean, properly-fitting filters keep water flowing as designed, reducing strain on the rest of your spa's equipment.
Tool-Free Installation
Lifts out and drops in without disassembling the filter compartment.
Product Overview
The Hot Tub Things® Flat Spa Filters 4-Pack is engineered to match the fit of Bullfrog® Spas' Simplicity® flat filter system, part number 10-00814. It's built for M Series, Swim Series, and A Series (2023 and later) spas that use Bullfrog's flat, plastic-free filter design — a newer format that relies on pleated media alone rather than the rigid plastic core found in older cylindrical cartridges.
Because Simplicity flat filters cycle out faster than traditional pleated cartridges, Bullfrog recommends cleaning or replacing them on a monthly basis rather than the 12+ month intervals typical of older filter styles. This 4-pack gives you enough filters on hand to keep one running while a spare dries out or gets a deeper clean — the maintenance rhythm this filter type is designed around.
Each filter drops directly into your Simplicity filter compartment with no cutting, no adapters, and no tools required. The flat profile is sized for Bullfrog's JetPak Therapy System housing, so it seats the same way the original does.
This is Hot Tub Things' own compatible version of the 10-00814 filter — not a Bullfrog-manufactured part — offered as a lower-cost alternative for owners who go through filters on this monthly cycle and want to stock up without paying OEM pricing every time.
Frequently Asked Questions
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It fits Bullfrog® Spas' Simplicity® flat filter compartment, used on M Series (M6–M9), Swim Series (S150, S180XD, S200), and A Series spas built in 2023 or later. It replaces Bullfrog part number 10-00814.
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No. Earlier A-Series spas use a different filter style, not the Simplicity flat filter. Check the part number on your current filter or your owner's manual before ordering.
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No — this is Hot Tub Things' own compatible version of the 10-00814 filter, built to the same fit. If you specifically want the Bullfrog-manufactured part, we also carry that listing separately.
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Bullfrog recommends cleaning or replacing Simplicity flat filters monthly — more frequently than older-style cylindrical filters. Rinse the active filter every 1–2 weeks and rotate in a fresh one from this 4-pack as needed.
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Unlike traditional cylindrical cartridges built around a rigid plastic core, this filter uses a flat, pleated design without a separate plastic core — Bullfrog's newer filter format for its JetPak Therapy System spas.
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Turn off power to your spa, remove the old filter from the compartment, drop in the new one in the same orientation, close the compartment, and restore power.
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