You know the frustration: you spend your weekend scrubbing algae off the walls, fishing leaves out of the skimmer, and still the water looks cloudy. A corded pool robot can change that. These machines plug into a standard outlet, drop into the water, and scrub every surface automatically. No batteries to recharge, no weak suction mid-cycle, just consistent cleaning power from start to finish. In this guide, we evaluate the best corded pool robot brands for 2026, focusing on models that deliver reliable performance, smart navigation, and easy maintenance. Whether you own an in-ground or above-ground pool, we have a recommendation for you. For more on top brands, check out our guide to top pool robot brands for waterline cleaning.
Pros
- Wall climbing feature cleans both floors and walls, reducing manual scrubbing.
- Active scrubbing brush provides deep cleaning without damaging pool surfaces.
- Easy top-load filter basket simplifies maintenance.
- Plug and play operation makes it user friendly, no complicated installation.
- Dolphin brand reputation for reliability and performance.
Cons
- Designed for in-ground pools only, not suitable for above-ground pools.
- No remote control or smartphone app for manual direction, relies on autonomous navigation.
- Initial investment may be higher compared to manual pool cleaning tools.
The Dolphin Nautilus CC Plus is a fully automatic robotic pool cleaner specifically engineered for in-ground pools up to 40 feet in length. It is best suited for pool owners who want a hands free cleaning solution that handles both floors and walls with minimal intervention.
Standout features include its active scrubbing brush which combines wall climbing power with a continuous scrub action. This means it loosens and removes stubborn dirt, algae, and debris from pool surfaces without the need for manual brushing. The top load filter basket is another highlight, allowing quick removal of captured debris for consistently clear water.
In real world performance, the plug and play design truly simplifies pool maintenance. Simply connect the power supply, drop the unit into the water, and let it run for about two hours. Its smart navigation ensures thorough coverage even around obstacles and irregular shapes. The build quality reflects Dolphin's40 plus year legacy in pool care, using durable materials to withstand constant submersion and chemical exposure.
One potential drawback is its limitation to in ground pools only, so owners of above ground pools will need a different model. Also, there is no manual remote control, but the autonomous navigation is generally effective. At just over20 pounds, it is easy to lift but may be heavy for some users. Overall, the NautilusCC Plus offers exceptional value for those seeking a reliable, low maintenance robotic cleaner.Final verdict: For in ground pool owners who value convenience and thorough cleaning, the Dolphin Nautilus CC Plus is a top choice. Its wall climbing scrubbing action, easy filter access, and set and forget operation make it a worthwhile investment that saves time and effort.
Brand: Dolphin
Model: Nautilus CC Plus
Color: Black
Dimensions: 16 x 10 x 16 inches
Weight: 20.8 pounds
Compatibility: In ground pools up to 40 feet in length
Cleaning Cycle: Approximately 2 hours
Pros
- Cordless operation eliminates tangled cables and external pump requirements.
- Strong 5000 GPH suction tackles a wide range of debris from leaves to fine particles.
- Long battery life allows cleaning of large pools in a single charge.
- Versatile cleaning modes provide targeted cleaning for floors, walls, and waterline.
- Easy filter access and rinsing keep maintenance simple and mess-free.
Cons
- No remote control or app connectivity for manual steering or scheduling.
- Battery recharge time of about 2.5 hours may be inconvenient for back-to-back cleanings.
- May struggle with very large debris like heavy wet leaves or twigs.
The BOTLIFE PC10 Cordless Robotic Pool Vacuum is designed for pool owners who want a thorough, hands-off cleaning experience. It works on both inground and above-ground pools, making it a versatile choice for residential use. With its powerful suction and smart navigation, it aims to reduce manual brushing and keep your pool pristine.
Standout features include the 5000 GPH suction that lifts leaves, sand, and fine debris into a 4-liter basket with 150-micron mesh. The dual drive motors and active brushes ensure dirt is scrubbed loose and trapped. In real-world use, the S- and N-path navigation helps the vacuum cover floors and walls systematically, cutting down on missed spots and repeated passes. The cordless design with a 5200mAh battery provides up to 120 minutes of runtime, sufficient for pools up to 1,830 square feet.
Build quality is solid with a durable plastic body and high-grip tracks that handle slopes up to 30 degrees. The vacuum self-parks near the edge when the cycle ends or battery runs low, making retrieval simple with the included hook. The top-load filter basket is easy to remove and rinse, adding to the convenience. However, the lack of a remote control or app connectivity means you cannot schedule cleanings or steer the unit manually.
One drawback is the 2.5-hour recharge time, which may interrupt consecutive cleanings for very large pools. Additionally, while the suction is strong, it may not handle extremely large debris like heavy wet leaves as effectively as some corded models. The vacuum also does not include a caddy for storage or transport, which could be a minor inconvenience.
Overall, the BOTLIFE PC10 offers excellent value for its price, combining cordless freedom, powerful suction, and intelligent navigation. It is best suited for pool owners who want a reliable, low-maintenance robotic cleaner without the complexity of apps or remotes. If you prioritize simplicity and effective cleaning, this vacuum is a strong contender.
Color: Deep Black
Dimensions: 10 x 15 x 9 inches
Product Group: Lawn & Patio
Suction Flow Rate: 5000 GPH
Battery: 5200mAh rechargeable, up to 120 minutes runtime
Charging Time: Approximately 2.5 hours
Maximum Pool Size: 1,830 sq ft
Cleaning Modes: Full Pool, Floor Only, Wall Only
Filter Basket Capacity: 4 liters with 150-micron mesh
Navigation: S-path on floor, N-path on walls
Maximum Slope: 30 degrees
Included Accessories: Hook for retrieval, charging adapter
Pros
- Cordless design eliminates hose tangling and provides freedom of movement.
- High suction (5000 GPH) and fine filtration effectively remove both large and small debris.
- Smart navigation with zigzag pattern ensures efficient coverage of all pool surfaces.
- Long runtime (120 minutes) covers large pools in a single charge.
- Easy retrieval with auto-park feature and user-friendly app control.
Cons
- At 0 reviews, real-world performance and reliability are unverified.
- App dependency may be a limitation for users preferring manual control.
- The 30-degree slope limit may not suit pools with steeper walls or complex shapes.
The BOTLUXE Pool Robot Vacuum is a cordless robotic cleaner designed for both inground and above ground pools, aiming to simplify pool maintenance. With a 5000 GPH suction power and a 4-liter filter basket, it targets leaves, sand, dirt, and fine debris, making it suitable for pool owners who want an automated cleaning solution without the hassle of hoses or manual scrubbing.
Standout features include its smart zigzag navigation, which systematically covers floors, walls, and waterline to minimize missed spots. The 120-minute runtime can handle pools up to 1,830 square feet on a single charge, and the 2.5-hour fast charging ensures it is ready for the next cycle quickly. The auto-park function is convenient, bringing the vacuum to the pool edge when the cycle ends or battery is low.
Design-wise, the BOTLUXE is built with durable tracks that can climb slopes up to 30 degrees, providing access to most pool surfaces. The cordless design eliminates tangled hoses, and the app allows you to preset cleaning modes, suction levels, and run times from land, then simply drop the vacuum in. The 150-micron fine filter basket captures both large and small particles, reducing the frequency of emptying.
Potential drawbacks include the lack of user reviews, making it difficult to gauge long-term reliability and real-world performance. The app control may not appeal to those who prefer simple physical buttons, and the 30-degree slope limit might not handle steeper pool walls or complex shapes. Additionally, the vacuum is currently only available in blue, which may not match all pool aesthetics.
Overall, the BOTLUXE Pool Robot Vacuum offers a compelling set of features for its price point, especially for pool owners seeking a cordless, app-controlled cleaner with strong suction and good coverage. However, given the absence of customer feedback, it is advisable to consider the 1-year warranty as a safety net. If you value convenience and automation, this could be a solid choice, but waiting for more reviews might provide extra confidence.
Pros
- Long 100-minute battery life covers large pool areas.
- Cordless operation eliminates cable tangles and installation hassle.
- Dual motors provide strong suction for various debris.
- Ultra-lightweight design (5.3 lbs) for easy handling.
- Auto-parking ensures easy retrieval after cleaning.
Cons
- Charging time of 3.5 hours may require planning for consecutive cleanings.
- Lacks advanced navigation features like mapping or scheduled cleaning.
- Suction may struggle with heavy debris like large leaves or acorns.
The Tnbacious Cordless Pool Vacuum Robot is a convenient cleaning solution for both above ground and inground pools. Designed for simplicity, it requires no cables or pumps, making it ideal for pool owners who want hassle-free maintenance.
Standout features include a 100-minute runtime covering up to 860 square feet, dual motors with 2,400 GPH suction, and two brushes that capture leaves, sand, and twigs. The cordless design and one-button start allow you to simply place it in the water and let it work automatically.
Build quality is lightweight at 5.3 pounds, with an auto-parking function that docks the robot against the pool wall when done. The filter rinses quickly, and the robot drains water rapidly for easy storage. However, the 3.5-hour charge time might require some planning for large pools.
Potential drawbacks include a lack of smart features like scheduling or app control, and the suction may not handle very large debris. It is best suited for routine cleaning and fine debris rather than heavy-duty tasks.
Overall, the Tnbacious Cordless Pool Vacuum Robot offers excellent value for its price, combining ease of use, decent runtime, and effective cleaning. It is a solid choice for pool owners seeking a simple, cordless automatic cleaner.
Color: Blue
Dimensions: 14.57 x 10.63 x 7.09 inches
Weight: 5.3 lbs
Battery Runtime: 100 minutes
Charging Time: 3.5 hours
Suction Flow: 2,400 GPH
Compatible Pool Types: Above Ground and Inground
Pros
- AI-powered navigation and debris detection speeds up cleaning significantly.
- Fully automated weekly scheduling with no user intervention required after initial setup.
- Effortless retrieval and automatic return to the waterline with app notifications.
- Wireless charging dock eliminates setup and keeps the robot stored neatly.
- Advanced filtration captures both large debris and microscopic particles for superior water clarity.
Cons
- Premium price point may be a barrier for budget-conscious buyers.
- Reliance on AI and app functionality could be problematic if connectivity issues arise.
- The robot may struggle with complex pool shapes or very large debris despite the AI camera.
The AIPER Scuba V3 is a revolutionary cordless robotic pool cleaner that leverages artificial intelligence to transform pool maintenance. It is designed for homeowners who want a truly hands-off experience, from scheduling to retrieval. The robot uses a single front-facing AI camera to detect over 20 types of debris and navigate directly to them, cleaning up to 10 times faster than traditional pool cleaners.
Standout features include the Cognitive AI Navium Mode, which creates autonomous weekly cleaning plans based on pool size, weather, and cleaning history. Once activated, the robot runs without any user intervention, keeping your pool consistently clean and swim-ready. The automatic return to the waterline after cleaning, coupled with real-time app notifications, eliminates the need to enter the pool or use tools for retrieval.
Design and build quality are impressive. The Scuba V3 weighs only 8.2 kilograms, making it easy to lift and transport. The wireless charging dock requires no installation and safely charges the robot without plugs or drying. The MicroMesh Multi Layer Filtration System captures both large debris (180 micron) and ultra fine particles (3 micron), ensuring crystal clear water. Additionally, the device is TUV certified for data privacy, processing all visual information on the device without storage or uploads.
Drawbacks include a higher price point that may not suit all budgets. The reliance on the AI and app means that connectivity issues could disrupt the automated scheduling. Also, while the AI camera is advanced, it may not handle every pool shape or extremely large debris perfectly. However, the 2-year advanced replacement warranty and 24/7 support provide peace of mind.
Overall, the AIPER Scuba V3 is a top-tier choice for pool owners seeking a smart, low-maintenance cleaning solution. Its AI-driven efficiency, effortless retrieval, and robust filtration make it a standout product in the robotic pool cleaner market. If you value convenience and are willing to invest in cutting-edge technology, this is an excellent option.
Color: Gray
Dimensions: 17.48 x 14.96 x 8.58 inches
Weight: 18.1 Pounds (8.2 kg)
Product Group: Lawn & Patio
Binding: Lawn & Patio
Battery: Cordless, rechargeable via wireless charging dock
Filter: MicroMesh Multi Layer (180 micron + 3 micron)
Navigation: AI Vision with front-facing camera, AI Patrol, Cognitive AI Navium Mode
Connectivity: App with real-time notifications
Warranty: 2-year product care with advance replacement
Data Privacy: TUV certified, on-device processing
Pros
- Powerful 5580 GPH suction for efficient debris removal
- Long 180-minute runtime ideal for large pools
- Smart navigation and four cleaning modes for customized coverage
- Cordless operation with no hoses to tangle
- Easy maintenance with top-load filter basket
Cons
- No customer reviews yet to confirm long-term reliability
- Wall climbing may be less effective on very smooth or slippery surfaces
- Filter basket may require frequent cleaning during heavy debris seasons
The CliBot S5 is a cordless robotic pool vacuum designed for owners of large inground and above ground pools up to 3,229 square feet. With its powerful triple brushless motors and 5580 GPH suction, it promises to capture everything from leaves and sand to fine silt in a single pass, making pool maintenance significantly easier.
Standout features include a smart navigation system with four cleaning modes (Smart, Floor, Wall, Auto) that ensures systematic coverage of the floor, walls, and waterline. The 180-minute runtime is impressive for a cordless model, and the 2.5-hour fast recharge keeps downtime to a minimum. The upgraded caterpillar tracks and PVA rollers provide good traction on slopes and various surfaces, including vinyl, tile, concrete, and fiberglass.
Design-wise, the S5 offers true cordless freedom with one-button operation and no tangled hoses. The smart directional return feature automatically parks the robot near the pool edge for easy retrieval. Maintenance is straightforward with a large top-load filter basket that simply opens, rinses, and reuses. The unit is built with durable components and comes with a 2-year warranty for added peace of mind.
Potential drawbacks include the lack of user reviews to verify real-world performance, and the wall climbing ability may vary on extremely smooth surfaces. The filter basket might need frequent emptying during heavy debris periods, but overall the design is practical and user-friendly.
Verdict: The CliBot S5 is a strong contender for anyone seeking a cordless, high-suction robotic pool cleaner for large pools. Its combination of powerful performance, smart navigation, and long runtime makes it a compelling choice, especially given the 2-year warranty. If you value convenience and thorough cleaning without the hassle of hoses, this model is worth considering.
Pros
- Cordless operation eliminates tangled cords and manual hose setup
- Wall and waterline scrubbing reduces hand-scrubbing effort
- Long 150-minute runtime covers large inground pools in one cycle
- Top-load filter basket simplifies debris removal and cleaning
- Auto-docking and quick-drain make retrieval convenient
Cons
- No remote control or app scheduling, so operation is limited to one-button mode selection
- At 26 pounds, the unit is still fairly heavy to lift out of the pool despite the quick-drain design
- Customer feedback is limited at this time, so long-term reliability is not yet independently verified
The EZIOOV U8 is a cordless robotic pool cleaner built for owners of medium to large inground pools up to 2,600 square feet. It is designed for anyone who wants automated cleaning of the floor, walls, and waterline without dragging hoses or spending weekends brushing. With a 150-minute runtime, the U8 can handle weekly maintenance in a single charging cycle.
The standout feature is wall and waterline scrubbing. Triple brushless motors and strong traction allow the robot to climb surfaces and remove grime, oil, and stuck-on debris that usually requires hand work. Gyroscope and ultrasonic sensors help it follow efficient paths and avoid obstacles while covering deep ends, corners, and ladder areas.
The 26-pound body feels solid in the pool, and the quick-drain design makes lifting easier after the cycle ends. Its 4-liter top-load filter catches fine dirt, sand, leaves, and larger debris, and you can empty the basket without turning the unit over. The carbon black finish looks clean, and a simple one-button control keeps the experience straightforward.
The main limitations are the lack of remote control or app scheduling and the unit's weight when removed from a deep pool. You choose a mode by pressing the button and let the robot do its work, but there is no way to steer it manually. Since this model has limited customer feedback available, long-term durability is not yet verified by extensive real-world use.
For pool owners who prioritize cordless freedom, wall scrubbing, and a long runtime, the EZIOOV U8 is a strong option. It simplifies routine maintenance and eliminates the tangles and setup of corded units. If you have a larger inground pool and prefer one-button automation, the U8 is worth serious consideration.
Pros
- Wall-climbing capability ensures thorough cleaning of pool sides and steps.
- Active scrubbing brush reduces manual labor and protects pool surfaces.
- Easy top-load filter access simplifies debris removal and maintenance.
- Quick plug-and-play setup with no complex installation required.
- Suitable for a wide range of pool shapes and sizes up to 33 ft.
Cons
- May not be ideal for very large pools exceeding 33 feet in length.
- Filter may need frequent cleaning in pools with heavy debris like leaves or sand.
- Price point is higher than some basic robotic cleaners, but offers advanced features.
The Dolphin Nautilus CC is a robotic pool cleaner designed to take the hassle out of pool maintenance. It is best suited for owners of above-ground or in-ground pools up to 33 feet in length who want a set-it-and-forget-it solution. With its wall-climbing ability and active scrubbing brush, this unit promises a thorough clean without manual effort.
Standout features include the top-load filter basket, which makes emptying debris quick and mess-free. The plug-and-play system means you can start cleaning in minutes: just plug it in, drop it in the water, and let it run for about two hours. Real-world performance is strong on walls and floors, though heavy debris may require more frequent filter cleaning.
Design-wise, the Nautilus CC is compact and lightweight at under 15 pounds, making it easy to lift in and out of the pool. The blue/black color scheme is standard, and the build quality feels durable. Dolphin has a legacy of reliability, and this model continues that tradition with robust materials and a simple interface.
One potential drawback is that the filter basket, while convenient, can fill up quickly in pools with lots of leaves or sand, requiring attention mid-cycle. Also, the price is higher than entry-level cleaners, but the added wall scrubbing and filter ease justify the cost for many users.
Overall, the Dolphin Nautilus CC is an excellent choice for pool owners who value convenience and effective cleaning. It delivers on its promises with minimal fuss, making it a worthwhile investment for maintaining a sparkling pool. If your pool fits within the size limit and you want to reduce manual work, this cleaner is highly recommended.
Pros
- Powerful 2280 GPH suction for effective debris removal.
- Long 130-minute runtime covers large pools.
- Cordless and self-parking for easy operation and retrieval.
- Dual-layer filtration catches fine particles and large debris.
- Fast recharge in 2-3 hours.
Cons
- Compatibility note: the product is recommended for in-ground pools with water depth under 2.5 meters, which may contradict the "above ground" labeling in the title.
- Not suitable for pools with slopes over 15° or significant bottom wrinkles.
- No reviews yet, so real-world performance is unverified.
The WYBOT A1 is a cordless robotic pool vacuum designed primarily for above ground pools, though the manufacturer notes it's suitable for in-ground pools with water depth under 2.5 meters. It's an ideal choice for pool owners who want a hassle-free, automated cleaning solution without the constraints of a power cord. With a powerful 2280 GPH suction and dual-layer filtration, it promises to keep your pool floor free of leaves, sand, and fine debris.
Standout features include the self-parking function that automatically stops near the pool wall when the battery is low, making retrieval simple. The smart edge cleaning pauses at pool edges to enhance debris pickup. The 130-minute runtime covers pools up to 1100 square feet, and the 2-3 hour recharge time means minimal downtime. The dual-layer filtration system uses a 180µm precision filter and a textured foam layer, improving filtration efficiency by 50% compared to standard robots.
Design-wise, the WYBOT A1 is compact at 12 x 8 x 6 inches, lightweight, and the black & green color scheme is visually appealing. The cordless, tangle-free design eliminates tripping hazards and simplifies storage. The robot is easy to operate: simply place it in the water and it starts cleaning automatically.
However, there are some drawbacks to consider. The product's compatibility note contradicts the "above ground" labeling, recommending only in-ground pools with water depth under 2.5 meters. It also cannot handle slopes over 15° or pools with significant bottom wrinkles. Additionally, as a new product with no reviews, long-term reliability and performance are unproven.
Overall, the WYBOT A1 cordless pool vacuum offers a compelling set of features at an affordable price. It's a great option for pool owners who need a cordless, self-parking robot with strong suction and long runtime. Just ensure your pool fits the specified depth and slope conditions before purchasing.
Buying Guide
Cleaning Coverage: Floor, Walls, and Waterline
Not all corded pool robots clean the same surfaces. Some focus only on the floor, while others climb walls and scrub the waterline. If you want a truly hands-off experience, choose a model that handles all three. The Dolphin Automatic Robotic Pool Vacuum Cleaner excels at wall climbing and active scrubbing, leaving no surface untouched. For above-ground pools, the Tnbacious Cordless Pool Vacuum Robot for Above covers floor and walls effectively, though it may not reach the waterline as thoroughly. Consider your pool’s shape and surface type when deciding.
For pools with steps or complex shapes, look for robots with smart navigation that adapt to obstacles. The CliBot S5 Cordless Pool Vacuum Robot uses advanced path planning to avoid repeated passes and missed spots. If you need a model that handles steps well, see our top robotic pool cleaner brands for steps.
Filtration System: Fine Debris and Large Particles
A good filter captures everything from sand to leaves. Corded robots typically use top-load filter baskets that are easy to empty. The AIPER Scuba V3 AI Vision Cordless Robotic Pool features a MicroMesh multi-layer filtration system with a 3-micron layer that traps invisible contaminants. For larger debris, the BOTLUXE Pool Robot Vacuum offers a 4-liter basket with 150-micron mesh. A larger basket means fewer trips to empty it, which saves time during heavy cleaning sessions.
If you have fine silt or algae spores, prioritize robots with finer filtration. The U8 Cordless Robotic Pool Cleaner for Walls uses a 4L top-load filter that handles both fine and large debris. For app-controlled models, check out our best pool cleaner brand with app control guide.
Ease of Use: Setup, Retrieval, and Maintenance
Corded robots should be plug-and-play. The Dolphin Nautilus CC Automatic Robotic Pool Vacuum is a classic example: plug it in, drop it in the pool, and it runs for 2 hours. Retrieval is simple with a top-load filter basket that you lift out without getting wet. Some models, like the BOTLIFE PC10 Cordless Robotic Pool Vacuum, offer self-parking near the edge for easy retrieval. Look for a lightweight design and quick-drain features to reduce lifting strain.
Maintenance is minimal: rinse the filter basket and check the brushes periodically. The WYBOT A1 Cordless Pool Vacuum Robot for Above is ultra-lightweight at 5.3 pounds, making it easy to lift and clean. For more on floor and wall cleaning, see our best pool cleaner brand for floors and walls article.
Durability and Warranty
A corded pool robot is an investment, so look for models with a strong build and a solid warranty. Dolphin has a 40-year legacy of reliability, and their robots often come with multi-year coverage. The CliBot S5 Cordless Pool Vacuum Robot includes a 2-year warranty, while the AIPER Scuba V3 offers a 2-year product care plan with advance replacement. Check the warranty terms before buying, especially for motors and seals. For above-ground pools, the Tnbacious Cordless Pool Vacuum Robot for Above is budget-friendly but still backed by a standard warranty. If you need a robot that handles leaves well, see our best above ground pool robot for leaves guide.
Final Thoughts
Choosing the right corded pool robot brand comes down to your pool size, surface type, and how much automation you want. For in-ground pools up to 40 feet, the Dolphin Automatic Robotic Pool Vacuum Cleaner offers unmatched wall-climbing power and a proven track record. If you prefer a cordless option with smart navigation for larger pools, the CliBot S5 Cordless Pool Vacuum Robot delivers extended runtime and thorough coverage at a competitive price. Both models represent top brands that prioritize performance and durability, so you can spend less time cleaning and more time enjoying your pool.
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Frequently Asked Questions
How long do corded pool robots typically last?
With proper maintenance, a quality corded pool robot from a top brand can last 3 to 5 years. Regular cleaning of the filter and brushes, plus storing the unit out of direct sunlight, extends its lifespan. Models like the Dolphin Nautilus CC Plus are built with durable components that withstand frequent use.
Can corded pool robots clean above-ground pools?
Yes, many corded robots work well in above-ground pools, but check the maximum pool length or area. The Dolphin Nautilus CC is rated for pools up to 33 feet, making it suitable for standard above-ground sizes. For larger above-ground pools, consider the CliBot S5 which covers up to 3,229 square feet.
Do corded pool robots climb walls effectively?
Top brands like Dolphin and AIPER design their robots with powerful tracks and active scrubbing brushes that climb walls and scrub the waterline. The Dolphin Nautilus CC Plus is specifically engineered for wall climbing, ensuring thorough cleaning on vinyl, tile, concrete, and fiberglass surfaces. For more on wall climbing models, see our best pool cleaner brand for floors and walls guide.
How often should I clean the filter on my corded pool robot?
After each cleaning cycle, rinse the filter basket with a garden hose to remove debris. For heavy debris loads, you may need to empty it mid-cycle. A clean filter ensures optimal suction and prevents clogs. Most top-load designs make this quick and easy, like on the Dolphin models.
