A compact vacuum should not force you to settle for weak suction or limited features. The FLEX STACK PACK 2.5-Gallon Wet/Dry Vacuum (FLEX-FX5231-Z) is built to handle dust, debris, spills, and everyday jobsite cleanup without taking up unnecessary space.
With up to 63 CFM of airflow, 82 inches of water lift, HEPA filtration, manual filter cleaning, and FLEX STACK PACK compatibility, this cordless wet/dry vacuum offers strong cleaning performance in a portable package. It also runs on the FLEX 24V battery platform, allowing professionals who already use FLEX cordless tools to power it with batteries they already own.
Compact Size, Serious Suction
Do not let the 2.5-gallon tank fool you. The FLEX-FX5231-Z delivers up to 63 CFM and 82 inches of water lift, giving it the strength to tackle both wet and dry messes.
The strong airflow helps collect sawdust, dirt, jobsite debris, and larger particles. Its water-lift rating gives it the suction needed to pull up heavier material and liquid spills.
This combination makes the vacuum useful for quick cleanups, tool dust collection, service work, remodeling projects, and general jobsite maintenance. Its compact design also makes it easier to carry into tight areas where a full-size shop vacuum may be inconvenient.
HEPA Filtration for Fine Dust Collection
Dust control matters, especially when working indoors or around fine construction debris. The FLEX STACK PACK Wet/Dry Vacuum includes a HEPA filter designed to capture 99.97% of particles measuring 0.03 microns or larger, according to the listed product specifications.
This filtration helps reduce the amount of fine dust released back into the work area. It can be especially useful when cleaning up after sanding, drilling, cutting, installation work, or other tasks that create airborne particles.
For applications that produce large amounts of dust, the vacuum is also compatible with dust bags. Using a dust bag can make disposal easier while helping keep the tank and filter cleaner.
Push-Button Manual Filter Cleaning
A clogged filter can quickly reduce a vacuum’s suction. The FLEX-FX5231-Z addresses this problem with a manual filter-cleaning system.
Pressing the filter-cleaning button helps clear built-up debris from the filter. This allows the vacuum to maintain stronger suction and can help extend the usable life of the filter.
The feature is especially helpful during dusty applications where fine material can build up quickly. Instead of stopping repeatedly to remove and clean the filter by hand, users can clear it with a simple push-button control.
Wireless Remote-Ready Operation
The FLEX 2.5-Gallon Wet/Dry Vacuum is compatible with the optional FT523 wireless remote, sold separately.
The remote can be mounted on the hose or attached to a tool, giving users quick access to the vacuum controls without needing to walk back to the unit. This can be useful when the vacuum is connected to a saw, sander, or other dust-producing tool.
Remote-ready operation also helps create a smoother workflow. Users can start or stop the vacuum from their work position, reducing unnecessary movement and making dust collection more convenient.
FLEX STACK PACK Compatibility
One of the biggest advantages of the FLEX-FX5231-Z is its compatibility with select FLEX STACK PACK storage components.
The vacuum can attach to compatible STACK PACK storage solutions, making it easier to transport tools, accessories, and cleanup equipment together. Instead of carrying the vacuum separately or trying to balance it on top of other toolboxes, it can become part of an organized mobile storage setup.
This feature is ideal for contractors and technicians who move between jobsites throughout the day. It helps reduce extra trips while keeping the vacuum securely organized with the rest of the equipment.
Built-In Storage for Accessories
Vacuum attachments are useful only when they are easy to find. The FLEX-FX5231-Z includes onboard storage for its hose, nozzles, adapter, and other accessories.
Utility nozzle
Crevice tool
Utility nozzle brush head
1-1/4-inch hose adapter
Flexible 1-1/4-inch hose
Dust bag
Shoulder strap
The utility nozzle helps collect more debris in a single pass. The crevice tool reaches into corners, along baseboards, and around narrow spaces. The brush attachment helps loosen and lift stubborn debris from surfaces.
Keeping these accessories stored directly on the vacuum reduces the chance of leaving an attachment behind or losing it in a truck or tool bag.
Expandable Hose and Shoulder Strap
The included 1-1/4-inch flexible hose expands from approximately 1.6 feet to 6.5 feet. This gives users additional reach while allowing the hose to remain compact during storage.
The included shoulder strap provides another convenient carrying option. Users can carry the vacuum while moving through a work area or keep it close during mobile cleanup tasks.
At approximately 10 pounds without the battery, the vacuum remains portable enough for service calls, punch-list work, installation projects, and quick cleanup around the jobsite.
Brushless Motor Performance
The FLEX-FX5231-Z uses a brushless motor for efficient cordless performance. Brushless motors are designed to reduce internal friction and help deliver consistent power while making better use of available battery energy.
The vacuum includes ECO and TURBO operating modes, allowing users to choose between longer runtime and maximum suction.
With an 8.0Ah FLEX 24V battery, listed runtime is approximately:
Up to 25 minutes in TURBO mode
Up to 60 minutes in ECO mode
Actual runtime may vary depending on the battery, material being collected, filter condition, hose configuration, and operating environment.
Part of the FLEX 24V System
The FLEX-FX5231-Z is compatible with all FLEX 24V batteries and chargers. This cross-platform compatibility makes it a practical addition for users who already own FLEX cordless tools.
FLEX describes its 24V platform as delivering 20% more power through 24V lithium battery technology, 25% longer runtime with THERMA-TECH heat management, and up to 50% faster charging with select high-power dual-fan chargers.
Because the vacuum is sold as a bare tool, users can choose the battery size that best fits their needs. A smaller battery may reduce overall carrying weight, while a higher-capacity battery can provide longer runtime for larger cleanup jobs.
The FLEX STACK PACK 2.5-Gallon Wet/Dry Vacuum FLEX-FX5231-Z offers a useful balance of suction, portability, filtration, and storage-system compatibility.
Its 63 CFM airflow and 82-inch water lift provide capable cleaning performance for a vacuum of this size. The HEPA filter, push-button filter cleaning, onboard accessory storage, expandable hose, and optional wireless remote support make it more than a basic portable vacuum.
The STACK PACK connection is another major benefit for FLEX users. It allows the vacuum to travel as part of an organized storage system instead of becoming another loose piece of equipment in the truck.
For professionals already invested in FLEX 24V tools, the FX5231-Z can be a practical addition to the cordless platform. It provides convenient wet and dry cleanup without requiring a power cord or a separate battery system. Don’t hesitate to reach out at cs@ohiopowertool.com or 614-481-2111 with any questions, comments, or concerns, and be sure to follow us on all your favorite social media channels to stay in the know on all the latest announcements, deals, news, and more!
