You have invested in a robotic pool cleaner to save time and keep your pool spotless, but even the best robot needs fresh filters to maintain peak performance. Over time, filter panels become clogged with debris, sand, and fine particles, reducing suction and water clarity. Buying a robotic pool cleaner filter 4 pack ensures you always have a clean set ready to swap in, extending the life of your cleaner and keeping your pool crystal clear. In this guide, we evaluate seven top-rated 4-pack filter options for popular brands like Dolphin, Hayward, and Chasing, focusing on compatibility, filtration quality, and durability.
Whether you own a Dolphin Nautilus CC Plus, a Hayward SharkVac, or a Chasing Hydro series robot, finding the right replacement filter pack is essential. We have assessed each product based on material quality, ease of cleaning, and how well it traps fine debris. For more details on choosing the right filter, check out our top robotic pool cleaner filter replacement kits guide.
Pros
- Designed to replace Maytronics 9991432-R4 for many Dolphin robotic cleaner models
- Ultra fine pleated media traps both small particles and larger debris effectively
- Reinforced ABS frame keeps the filter stable during operation
- 4 pack provides good value and a longer interval before you need to reorder
- Simple maintenance with periodic rinsing every 4 to 6 weeks
Cons
- Not compatible with many Dolphin models such as Nautilus CC, M600, S200, Triton PS, and others, so check fit carefully before buying
- Aftermarket part is not an original Maytronics product, which may matter to some buyers
- No customer reviews are available yet, so long-term real-world performance is less proven
The Funmit M400 Ultra Fine Cartridge Filter is a 4 pack replacement designed for the Dolphin Nautilus CC Plus and a wide range of compatible robotic pool cleaners. It replaces Maytronics part 9991432-R4, making it a practical option for pool owners who want dependable filtration without the premium price of the OEM part.
The standout feature is the ultra fine pleated filter paper, which captures sand, leaves, hair, and other debris while maximizing surface area. The heavy duty ABS plastic frame keeps the pleats stable during operation and prevents the filter from deforming under water flow, so the cleaner maintains strong suction and consistent performance.
Maintenance is straightforward: rinsing the filter every 4 to 6 weeks is enough to keep it working well, and with proper care each filter can last 2 to 3 years. The 4 pack is especially convenient for owners who clean frequently or have a large pool, because there is always a fresh filter on hand.
The main drawback is compatibility. This filter does not fit several popular Dolphin models, including Nautilus CC, M600, S200, Triton PS, and others, so it is essential to verify your pool cleaner model before purchasing. As an aftermarket part, it also does not carry the original manufacturer branding, though the build quality is solid for the price.
Overall, the Funmit M400 filter replacement offers strong filtration, durable construction, and good value for owners of compatible Dolphin robotic cleaners. If you confirm the fit first, this 4 pack is a smart, budget friendly way to keep your pool clear all season.
Color: White
Dimensions: 10.5 x 6.375 x 10.5 inches
Package includes: 4 cartridge filters
Replaces Maytronics part 9991432-R4
Compatible with Dolphin Nautilus CC Plus, M400, M500, M200, M4, M5, Wave 65, Wave 90, C3, C4, Oasis Z5i, Aquarius XL, Liberty, Odyssey, Sigma, Triton Plus (old)
Buying Guide: What to Look for in a Robotic Pool Cleaner Filter 4 Pack
Compatibility with Your Pool Cleaner Model
Not all filter packs fit every robot. Always verify that the replacement filter matches your specific model number. For Dolphin owners, the GJK 4 Packs 9991432-R4 Filters Replacement works with the Nautilus CC Plus, M200, M400, M500, and many others. Hayward users should look for packs like the 4 Pack for Hayward Sharkvac Filters RCX70101PAK2 designed for TigerShark and SharkVac series. Check your cleaner’s manual or look for part numbers such as 9991432-R4 or RCX70101.
Filtration Efficiency: Ultra Fine vs. Spring Filters
Filter material determines how small a particle the pack can capture. Ultra-fine pleated paper or PET fabric traps sand, silt, and even pollen, leaving water sparkling clear. The M400 Ultra Fine Cartridge Filter Replacement from Funmit uses heavy-duty ABS frames and super-fine PET filter paper for maximum efficiency. Some packs, like the Spring Filter Cartridges Work with Dolphin from Kerneed, offer a spring mesh screen that captures larger debris first, preventing premature clogging in very dirty pools.
Build Quality and Longevity
A durable filter pack saves you money over time. Look for reinforced ABS plastic frames that resist cracking and warping. The SUNRRA Ultra Fine Filter Compatible with TigerShark models features a heavy-duty ABS frame rated to last two to three years with proper care. Similarly, the 9991467-r4 Ultra-Fine Filter Panels for Dolphin from CLLOMAGY are numbered for easy installation and made to withstand frequent rinsing.
Ease of Cleaning and Maintenance
All filter packs require regular rinsing every four to six weeks. Some designs make this simpler. The Chasing Hyper-fine Filter Basket features a top-load access that lets you remove and clean the basket in seconds without full disassembly. For standard cartridge panels, a garden hose with a spray nozzle works well. Avoid using harsh chemicals that can degrade the filter material.
For more insights on different filter types, see our top robotic pool cleaner replacement filter packs article and our guide to ultra fine filters.
Final Thoughts
Choosing the right robotic pool cleaner filter 4 pack comes down to your specific robot model and the type of debris you typically encounter. For Dolphin owners who want ultra-fine filtration at a great value, the GJK 4 Packs 9991432-R4 Filters Replacement delivers outstanding performance with a 4.9 rating and a pleated design that traps even the smallest particles. If you own a Hayward SharkVac or TigerShark, the 4 Pack for Hayward Sharkvac Filters RCX70101PAK2 offers a three-layered PET fiber construction that excels in both fine filtration and durability. Whichever you choose, keeping a spare set of clean filters on hand ensures your robotic cleaner always runs at its best, saving you time and keeping your pool inviting all season long.
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Frequently Asked Questions
How often should I replace the filters in my robotic pool cleaner?
Most manufacturers recommend rinsing your filters every four to six weeks and replacing them every one to two years, depending on usage and water conditions. If you notice reduced suction or cloudy water, it is time for a fresh set. Using a robotic pool cleaner filter 4 pack allows you to rotate filters easily.
Can I use a 4-pack of filters meant for a different brand?
Only if the filter dimensions and attachment system are identical. Many aftermarket packs are designed to fit multiple models, but always check the compatibility list. For example, the GJK 4 Pack fits Dolphin M200/M400/M500 and Nautilus CC Plus, while the TUOWS pack is specifically for Hayward SharkVac and AquaVac series.
What is the difference between ultra-fine and spring filters?
Ultra-fine filters use densely pleated paper or fabric to capture tiny particles like sand and pollen. Spring filters have a screen mesh that catches larger debris first, which helps prevent clogging in very dirty pools. Some users start with spring filters for the first few cleanings and then switch to ultra-fine for regular maintenance. For more details, read our guide to replacement fine filters.
How do I clean my robotic pool cleaner filters properly?
Remove the filter panels and spray them with a garden hose from the inside out to dislodge trapped debris. Avoid using a pressure washer or stiff brush that could damage the pleats. Let them air dry completely before reinstalling. Regular cleaning extends the life of your robotic pool cleaner filter 4 pack.
