Maytronics 9991425-R4 Ultra Fine Cartridge Filter - Large

What This Part Is Used For
This large ultra fine cartridge filter installs inside compatible Maytronics robotic pool cleaners. It captures fine debris such as silt, dust, and small suspended particles during cleaning cycles. The cartridge is removable for rinsing and routine maintenance.

Why This Part Matters
Fine particulate can pass through standard filtration if media is worn or clogged. Reduced filtration efficiency impacts water clarity and cleaning performance. Replacing the ultra fine cartridge restores proper internal debris capture. Routine filter maintenance supports consistent suction and coverage.

Key Features and Specifications

• Manufacturer part number: 9991425-R4
• Ultra fine cartridge filter
• Size: Large
• Designed for compatible Maytronics robotic cleaners
• Removable and cleanable filter configuration

Installation and Fitment Guidance
Remove the cleaner from the pool and disconnect power before accessing the filter compartment. Ensure proper seating within the filter housing before operation. Confirm by manufacturer part number before ordering.

About the Maytronics Brand
Maytronics designs robotic cleaners with adaptable internal filtration systems to match debris conditions. Ultra fine options are used when pools experience heavy dust or sediment. Their modular design allows quick filter changes in the field. The brand supports long term robotic maintenance with accessible replacement parts.

Common Service Context
Technicians install ultra fine cartridges during spring startup or after construction activity. It is common in environments with recurring fine debris issues. Routine inspection often reveals clogged filter media requiring replacement.