Nu Cobalt 731-i Automatic Pool Robot Wall Climber for Medium to Large In Ground Pools
Condition: New
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$199.95
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was $1,298.00
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This item is eligible for return within 30 days of receipt
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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At a glance
- Condition
- New
- Model
- 731-i
- Color
- Black
- Material
- Cobalt
- Power Source
- Corded Electric
- Control Method
- Remote
- Engine Type
- Electric
Features 5
- No need to vacuum. Cleans and brushes floor and walls, revolutionary lightweight design, recommended for medium to large in ground pools up to 20 x 40 x 8' deep
- Two hours timer with auto shut off. direct-drive motor for greater traction and serviceability
- All surface cleaning for vinyl liner, fiberglass and concrete pools, quick-drain system for lightweight removal from pool
- Extra-large pleated filter bag, 50' power cord with diagnostic NO-TWIST swivel, brush-to-port suction for thorough vacuuming of acorns, leaves and fine debris
- One year limited warranty, ETL, CSA and CE approved
Specs 19
| Brand | Nu Cobalt |
|---|---|
| Model Name | 731-i |
| Material | Cobalt |
| Color | Black |
| Power Source | Corded Electric |
| Other Special Features of the Product | Lightweight |
| Control Method | Remote |
| Engine Type | Electric |
| Load Capacity | 1E+1 Pounds |
| Required Assembly | No |
| Warranty Type | Limited |
| Installation Type | plug-and-play" or "portable |
| Material Type | Cobalt |
| Product Care Instructions | Wrap the cord neatly and store in a dry place. Regularly clean the filter bag and drain and store the product in a dry place to prevent damage. |
| Hose Length | 15.24 Meters |
| Brand Name | Nu Cobalt |
| UPC | 679042153946 |
| Unit Count | 1.0 Count |
| Manufacturer | Thunder Host Limited |
No specs match.
Frequently asked questions
This product is currently out of stock. Please check back later for shipping info.
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Great Vacuum For The Price!!!
I have had this pool vac for a week now and so far it is amazing. It comes fully assembled except for plugging in the cords. They are color coded so as not to plug them into the wrong socket. The cord is on swivels so it never gets tangled or obstructs the unit from cleaning. It comes with a fine sediment filter and also a filter for large debris. Both are super simple to access remove and clean. No tool required. It has powerful suction to clean and climbs right up the walls to the waterline before reversing back down into the pool. Absolutely no issues with pool bottom pitch at all. This thing is a tank. My pool has never looked this clean. My feet can feel the diffrence on the bottom of the pool now that all the sand is gone. You cannot find any other unit for this price that cleans like this one does. If it stands up to time it will be a great unit. I will keep any changes posted as time goes by.
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Reviewed in the United States on August 2, 2023 by Christopher
Do NOT BUY! It will not last.
Stopped working after 2 weeks. It was decemt when it worked.
Reviewed in the United States on June 19, 2025 by ɌΔ⟆ΓΞŊ
Awesome Cleaner
I am so glad I purchased this cleaner! Took it out of the box and put it to work. Our pool is sloped with crevices and this guy cleaned every inch. Climbs the walls up just past the water line where you can hear and see the suction power. The product description didn't show that the cleaner comes with a fine filter and the bag filter. The fine filter worked great and was easy to clean. My previous cleaner was cordless but couldn't climb the walls. The cord was no problem, didn't tangle, and was easy to put away. For the price I think this cleaner is a superior value to the other more "well known" cleaners.
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Reviewed in the United States on October 12, 2022 by Jeff
Awesome pool cleaner
I've already recommended this pool cleaner to my neighbors. I've had 3 others over the past 12 years. This is not very expensive compared & way better than ALL the others I've tried. The bag filter has 7 pockets with really trap & hold: leaves sand dirt even algae. It takes some effort to clean but it's worth the effort & it cleans my pool fantastically! Super happy. Also it seems to be really well designed & built & manufactured.
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Reviewed in the United States on August 1, 2024 by LoyalFriend
Good quality. Cleans pool well, but in a random pattern; hard to clean out robot.
Cleans very well, but has a random pattern. It's fairly hard to clean the robot out when done. I would have loved it, but my pool liner tore (not the robot's fault) and I won't be using it again.
Reviewed in the United States on September 9, 2025 by Larry Elie
Worked for three months then broke a wheel while cleaning and now won't do anything. Worked for three months then broke a wheel while cleaning and now won't do anything.
When this robot worked , it only worked for roughly 3 months. First, it broke a wheel and Nu Cobalt sent a replacement wheel. This suggests shotty quality. I sent a communication to Nu Cobalt. Nu Cobalt responded and sent the replacement parts I need. There were no directions and I also noticed the treads are pretty worn for a robot that is only three months old. Then, 2 weeks later, it just died. Power supply flashes purple. Robot doesn't move. If you are looking for quality, it isn't with Cobalt. I've reached out to the seller asking for a refund or a new unit. They will not do anything unless I pay to ship this useless waterweight back to them. I am out $600 and Nu Cobalt doesn’t seem to care. Luckily, Amazon made it right and I was able to get my money back no thanks to Nu Cobalt. Skip this robot. Buy from a more reputable manufacturer who will make a product that lasts more than four months and back that product up when it fails on you. Caveat Emptor.
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Reviewed in the United States on December 7, 2022 Reviewed in the United States on December 7, 2022 by Nick
Outstanding Pool Cleaner
I have used about every type of pool cleaner available. Expensive suction driven unit that required replacement parts all the time, Kreepy Krawly knock off that lasted a year, and a battery powered robotic that couldn't climb walls. I took a chance with this unit even though it had some poor reviews. I'm surprised it isn't flying off the shelves at this price. It is comparable with units twice it's cost. Only drawback is cleaning the filters of which there are two. One for larger debris and one for finer debris. I haven't used the finer one yet, but am confident it will clean up the dead algae I have remaining in the pool. It's well engineered and a quality product.
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Reviewed in the United States on August 2, 2023 by Rex G. Kunz
This is the best pool vacuum you can get for the money
I have never posted a review before. I bought 2 other vacuums before I bought this one. I returned the other 2 because they didn't perform worth a crap. This pool vacuum climbs the walls and the hole pool . I leave in until it shuts off which is about 2 hours. Then I take it out and my 16 x 32 8 feet at the deep end is perfectly clean. It was very hard to find on Amazon. I think I just got lucky to find it. I have a friend that has a $600 one and mine does just as job and over $400 less. Best thing I purchased this year.
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Reviewed in the United States on September 3, 2023 by Bonnie Rutter