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ZAOJIAO Auto-top-Off ATO Solution Auto Water Filler Adjustable Float Valve Mounting for Aquarium Sump

4.3 4.3 out of 5 stars 558 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Aquarium Test Kits by ZAOJIAO

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ATO system(Acrylic bracket)
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Purchase options and add-ons

  • The ATO system is easy to hang on to your aquarium sump.
  • It is suitable for 5 to 18mm thickness of aquarium.
  • Pressure: 0.02-0.8MPa.
  • Material: Polyethylene Plastic and Acrylic.
  • The range of Water level from aqurium sump top is 0-25mm or 0-10".

Customer ratings by feature

Easy to install
4.3 4.3
Accuracy
3.9 3.9
Value for money
3.7 3.7

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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Package Dimensions ‏ : ‎ 6.73 x 5.83 x 1.85 inches; 3.53 ounces
  • Item model number ‏ : ‎ 14858009
  • Date First Available ‏ : ‎ April 7, 2017
  • Manufacturer ‏ : ‎ ZAOJIAO
  • ASIN ‏ : ‎ B06Y42PPWN
  • Customer Reviews:
    4.3 4.3 out of 5 stars 558 ratings

Product information

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ZAOJIAO Auto-top-Off ATO Solution Auto Water Filler Adjustable Float Valve Mounting for Aquarium Sump

ZAOJIAO Auto-top-Off ATO Solution Auto Water Filler Adjustable Float Valve Mounting for Aquarium Sump


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Product Description

The ATO system is easy to hang on to your aquarium sump,it can automatically fill and shut off inlet water. you make it fit a wide variety of positions and heights.
1, It is suitable for 5 to 18mm thickness of aquarium.
2, The range of water level from aquarium sump top is 0-25mm or 0-10".
3, The bracket is made with high quality 5mm acrylic.
4, It meet 1/4" tube, come with O-ring, don't leak.

Packing list:
1 x Float valve
1 x Acrylic bracket
4 x Nylon screw

Customer reviews

4.3 out of 5 stars
4.3 out of 5
558 global ratings

Customers say

Customers like the performance of the pet supplies. They say it works great and gets the job done. They are also satisfied with the value, and adjustability. However, some customers have reported issues with durability, saying the bracket easily broke. They also are disappointed with leakage. Opinions are mixed on quality, ease of installation, and float.

AI-generated from the text of customer reviews

24 customers mention24 positive0 negative

Customers are satisfied with the performance of the vivarium pump. They mention that it works great, the bracket works surprisingly well, and it gets the job done. Some say that it's adjustable and works perfect for their pond. Overall, most are happy with the quality and performance of this product.

"Easy to install and works great. Love how it mounts and the adjustable design." Read more

"...FOLLOW-UP ... once I got this installed properly it seems to be working very well...." Read more

"...Great product, bracket worked surprisingly well...." Read more

"This is the second one of these ive bought and they work pretty good...." Read more

6 customers mention6 positive0 negative

Customers appreciate the value of the vivarium. They say it's well worth the money, a great buy, and a good product for DIY water projects.

"...Great product, bracket worked surprisingly well...." Read more

"...Works fine. It’s cheap and gets the job done." Read more

"...Well worth the money!" Read more

"Great price, good product for DIY water projects..." Read more

4 customers mention4 positive0 negative

Customers like that the vivarium is adjustable. They mention that the platform with an adjustable level is the best way to go.

"Easy to install and works great. Love how it mounts and the adjustable design." Read more

"...The plexiglass platform with an adjustable level is definitely the best way to go as compared with less expensive "poke a hole in something"..." Read more

"...It can be adjusted to many different water levels,It is made of quality materials.I would recommend this top off to a friend" Read more

"love that it's adjustable and worked perfect for my pond." Read more

16 customers mention6 positive10 negative

Customers have mixed opinions about the quality of the vivarium. Some mention that it works as it says and is of good quality, while others say that it is not a good product and failed 100% thereafter.

"...the float fully under water it couldn't hold the valve shut so it flooded my den. I'm still trying to dry the carpet 3 days later...." Read more

"Reliable" Read more

"It’s alittle cheaply made I wouldn’t trust it under pressure" Read more

"Very well-made, I was skeptical because of all the reviews of people saying they were breaking the hanging bracket but I think the problem is in..." Read more

11 customers mention6 positive5 negative

Customers are mixed about the ease of installation. Some mention it's easy to install and hook up, while others say it was not instruction to install it.

"Easy to install and works great. Love how it mounts and the adjustable design." Read more

"...Too bad there are no instructions with this or the other units as it probably would prevent lots of returns...." Read more

"This is a simple system to install. I am not running it on a pressurized line. I am gravity feeding from a tank for my ato system in my sump...." Read more

"...It comes with NO instructions or paperwork of any kind. You assemble and adjust it by guess-work...." Read more

8 customers mention5 positive3 negative

Customers have mixed opinions about the float. Some say it's just what they need, it keeps the water level steady, and works ok for the aquarium, while others say that there's not enough clearance of the Float to allow complete filling, and the bracket broke off.

"...It is keeping my water levels perfect. It definetly has reduced my to do tasks every morning...." Read more

"...Pictured is how i found it today: water covering the float by inches...." Read more

"Keeps the water level steady. Do not know why I did not get one before." Read more

"Love it, it keeps my sump level without even moving. Very accurate...." Read more

8 customers mention0 positive8 negative

Customers are dissatisfied with the leakage of the vivarium. They mention that the mounting easy cracked and the valve fails to seal most of the time.

"As other reviews have said, the valve still leaks by when the tank is full, so use a ball valve in-line with this product and only use it to fill..." Read more

"The float started leaking a week after using. Caused the sump to overflow." Read more

"As others have stated it leaks so you had better be turning your RO water off or it was overflow. Slow leak but it will leak at the connection." Read more

"...The valve then LEAKED continuously when it was supposed to be in the off position...." Read more

6 customers mention0 positive6 negative

Customers are disappointed with the durability of the pet supplies. They mention that it easily broke in half, the back of the bracket broke off, and the mounting easy cracked.

"...I've owned my valve for a year now and the back of the bracket broke off and the whole float was in my tank...." Read more

"Loves it! Except for the brittle plastic. It easily broke in half...." Read more

"...It will break but I super glued it back together and is still working! Well worth the money!" Read more

"The plastic mount snapped off so I had to use some clamps to mount it. I had it on a standard 55 gallon tank" Read more

Works well with the right pressure.
5 Stars
Works well with the right pressure.
I wanted to write a review because of all bad press these little floats have gotten. (fresh water setup)In the pictures above, you will see where I used the blue tubing kit and I baught the extra tubing just incase I messed up.Runing the tubing (hidden) along behind the shelf, I did put in the (provided) ballvalve to cut off the water at the tank.Under the sink, I used two Ice maker line kits with the taps. One to the hot and one to the cold. This will balance the desired temp to the tank. The line tap valves allow me to adjust the temp and the preasure on the float. (This is the key).If your float bypasses after its all hooked up and full? Simply shut the preasue on the line tap valves. (problem salved).Everything you see, I got with three kits. No extra parts were used.Notice the extra "T" with valve? This is for the ice maker on the fridge. If you are worried about warm water to the ice maker? Science has proven, hot water freezes faster and cleaner.Well! I just found out I can not "Link" so. The searchable names of the products below.Malida RO Water Systems Ice Maker Kit 1/4" for Reverse Osmosis Systems and Water Filters (blue)cck cck-2 Malida Size 1/4 Inch, 10 Meters 30 feet Length Tubing Hose Pipe for RO Water Filter System (blue)2 of the LDR 509 5100 Ice Maker/Humidifier Installation Kit, 1/4-Inch x 25-Foot, Poly TubingI hope this helps for people who want an automated fill for fish tanks.
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Top reviews from the United States

Reviewed in the United States on September 15, 2018
Color: ATO system(Acrylic bracket)Verified Purchase
I wanted to write a review because of all bad press these little floats have gotten. (fresh water setup)
In the pictures above, you will see where I used the blue tubing kit and I baught the extra tubing just incase I messed up.
Runing the tubing (hidden) along behind the shelf, I did put in the (provided) ballvalve to cut off the water at the tank.
Under the sink, I used two Ice maker line kits with the taps. One to the hot and one to the cold. This will balance the desired temp to the tank. The line tap valves allow me to adjust the temp and the preasure on the float. (This is the key).
If your float bypasses after its all hooked up and full? Simply shut the preasue on the line tap valves. (problem salved).
Everything you see, I got with three kits. No extra parts were used.
Notice the extra "T" with valve? This is for the ice maker on the fridge. If you are worried about warm water to the ice maker? Science has proven, hot water freezes faster and cleaner.
Well! I just found out I can not "Link" so. The searchable names of the products below.
Malida RO Water Systems Ice Maker Kit 1/4" for Reverse Osmosis Systems and Water Filters (blue)
cck cck-2 Malida Size 1/4 Inch, 10 Meters 30 feet Length Tubing Hose Pipe for RO Water Filter System (blue)
2 of the LDR 509 5100 Ice Maker/Humidifier Installation Kit, 1/4-Inch x 25-Foot, Poly Tubing

I hope this helps for people who want an automated fill for fish tanks.
Customer image
5.0 out of 5 stars Works well with the right pressure.
Reviewed in the United States on September 15, 2018
I wanted to write a review because of all bad press these little floats have gotten. (fresh water setup)
In the pictures above, you will see where I used the blue tubing kit and I baught the extra tubing just incase I messed up.
Runing the tubing (hidden) along behind the shelf, I did put in the (provided) ballvalve to cut off the water at the tank.
Under the sink, I used two Ice maker line kits with the taps. One to the hot and one to the cold. This will balance the desired temp to the tank. The line tap valves allow me to adjust the temp and the preasure on the float. (This is the key).
If your float bypasses after its all hooked up and full? Simply shut the preasue on the line tap valves. (problem salved).
Everything you see, I got with three kits. No extra parts were used.
Notice the extra "T" with valve? This is for the ice maker on the fridge. If you are worried about warm water to the ice maker? Science has proven, hot water freezes faster and cleaner.
Well! I just found out I can not "Link" so. The searchable names of the products below.
Malida RO Water Systems Ice Maker Kit 1/4" for Reverse Osmosis Systems and Water Filters (blue)
cck cck-2 Malida Size 1/4 Inch, 10 Meters 30 feet Length Tubing Hose Pipe for RO Water Filter System (blue)
2 of the LDR 509 5100 Ice Maker/Humidifier Installation Kit, 1/4-Inch x 25-Foot, Poly Tubing

I hope this helps for people who want an automated fill for fish tanks.
Images in this review
Customer image Customer image Customer image Customer image
Customer imageCustomer imageCustomer imageCustomer image
8 people found this helpful
Report
Reviewed in the United States on May 16, 2023
Color: ATO system(Acrylic bracket)Verified Purchase
Easy to install and works great. Love how it mounts and the adjustable design.
Reviewed in the United States on July 31, 2021
Color: ATO system(Acrylic bracket)Verified Purchase
I have a tank for exotic plants which requires a 2-inch level of water at all times. I've tried several of these (they all seem to be based on the same basic design) and found it rather confusing both in terms of the size of the hoses that are compatible and it terms of performance. There are plenty of ways to step up or step down hose sizes, so I won't get into that. However in terms of performance, I didn't find any of these which didn't leak where the hose connects to the float unit. What I did learn after some trial and error, however, is that a little plumbers teflon tape fixes the leak problem straight away (at least it did for my setup).

Too bad there are no instructions with this or the other units as it probably would prevent lots of returns.

FOLLOW-UP ... once I got this installed properly it seems to be working very well. The plexiglass platform with an adjustable level is definitely the best way to go as compared with less expensive "poke a hole in something" offerings. I would buy this again and do recommend it. Use teflon tape to prevent leakage around the tube-to-unit connector.
2 people found this helpful
Report
Reviewed in the United States on December 1, 2020
Color: ATO system(PC bracket)Verified Purchase
I use this product as a water top off for my 11 aquarium, it keeps me from having to carry and store water to fill the tanks each week, what i had a problem with is that it didn't fit over the edge of my bigger tanks (30g-90g),so I had to modify the bracket so to fit over the lip ,other then that I love this complete package and would recommend it to anyone with as many tanks as I have, thank you and look forward to future orders from me. Aaron C.
Reviewed in the United States on May 24, 2021
Color: ATO system(Acrylic bracket)Verified Purchase
Love it! I’ve missed my morning coffee before because I didn’t realize until too late that the reservoir was empty. I’m so glad to have my mornings simplified even one little step more. Great product, bracket worked surprisingly well. I’m working on a way to modify the lid so I don’t have dust, but for now a piece of plastic wrap keeps out stuff.
Customer image
5.0 out of 5 stars Great product
Reviewed in the United States on May 24, 2021
Love it! I’ve missed my morning coffee before because I didn’t realize until too late that the reservoir was empty. I’m so glad to have my mornings simplified even one little step more. Great product, bracket worked surprisingly well. I’m working on a way to modify the lid so I don’t have dust, but for now a piece of plastic wrap keeps out stuff.
Images in this review
Customer image
Customer image
2 people found this helpful
Report
Reviewed in the United States on January 26, 2022
Color: ATO system(Acrylic bracket)Verified Purchase
The adjustment screw that will be directly IN or right above the surface of the water is METAL. This is a major problem for a salt tank. It will rust VERY quickly and contaminate the water. There is zero metal on anything else in my tank. This could kill potentially thousands of dollars in livestock. I'm not sure why it isn't nylon like the rest of the white parts. I like the rest of the assembly. Some of the photos above seem to show a plastic pin and the one shows a metal screw. I was hoping that was a stock photo of the float valve, especially after TWO other buyers answered my question stating that it's "all plastic", but the pictured valve above is exactly what you will receive. I'm pretty disappointed. I may keep it and try to glue it together or order a plastic screw elsewhere, but there's no way I would put this anywhere near saltwater with all your pricey animals and corals in it. I thought since it was made for aquariums, it would be usable, but sadly it's not in its default state.
6 people found this helpful
Report
Reviewed in the United States on January 24, 2021
Color: ATO system(Acrylic bracket)Verified Purchase
I needed a float valve that would fit on a 5 gal bucket and turn off the RO/DI unit when the bucket was full. Fits on the bucket just fine. No wasted water and filter media if I forget to turn off the RO unit.
Reviewed in the United States on February 24, 2022
Color: ATO system(PC bracket)Verified Purchase
I've tried to make this work for the past 3 weeks. Every morning I wake up to check it, and every time it's overfilled. One of the first days I didn't check until late in the day, and by then it overfilled the sump & flooded the room a bit.

It comes with NO instructions or paperwork of any kind. You assemble and adjust it by guess-work. I had no idea why it wasn't working right so I tried lots of things: different heights, different compartments, change angle of water line coming in, tighten everything, etc I moved it out of the motor compartment, worrying churning water was to blame. Tried turning pumps' speed way back, worried the current was an issue. Nope -- still overfills.

Pictured is how i found it today: water covering the float by inches. If I don't drain the excess water, it WILL KEEP RISING until it overflows the sump tank completely

My pressure coming in shouldn't be too much. It's coming off my RO water filtration system via 1/4" tubing. This is a common way people fill big tanks.

I read other reviews who said the "simple" solution was to cut the water supply off to it when you're not around. But doesn't that defeat the purpose of an automatic system??
Customer image
1.0 out of 5 stars Free flood with purchase
Reviewed in the United States on February 24, 2022
I've tried to make this work for the past 3 weeks. Every morning I wake up to check it, and every time it's overfilled. One of the first days I didn't check until late in the day, and by then it overfilled the sump & flooded the room a bit.

It comes with NO instructions or paperwork of any kind. You assemble and adjust it by guess-work. I had no idea why it wasn't working right so I tried lots of things: different heights, different compartments, change angle of water line coming in, tighten everything, etc I moved it out of the motor compartment, worrying churning water was to blame. Tried turning pumps' speed way back, worried the current was an issue. Nope -- still overfills.

Pictured is how i found it today: water covering the float by inches. If I don't drain the excess water, it WILL KEEP RISING until it overflows the sump tank completely

My pressure coming in shouldn't be too much. It's coming off my RO water filtration system via 1/4" tubing. This is a common way people fill big tanks.

I read other reviews who said the "simple" solution was to cut the water supply off to it when you're not around. But doesn't that defeat the purpose of an automatic system??
Images in this review
Customer image
Customer image
2 people found this helpful
Report

Top reviews from other countries

Denis
5.0 out of 5 stars works properly
Reviewed in Canada on February 13, 2023
Color: ATO system(Acrylic bracket)Verified Purchase
simple to set up and does the job.
Rodney Olguin
3.0 out of 5 stars Float valve feels cheap for the price
Reviewed in Germany on February 2, 2024
Color: ATO system(Acrylic bracket)Verified Purchase
The bracket has been very useful. Unfortunately, the float valve seems to be made of very cheap plastic and it doesn't look like it will last very long. I'm affraid to adjust the position of the float; the screw is very low quality and it seems like a crossthread can happen easily.
Joe
5.0 out of 5 stars Described perfectly
Reviewed in Canada on March 14, 2021
Color: ATO system(PC bracket)Verified Purchase
I bought this product for the bracket. I used the bracket for lifting my high level sensor on my automatic top off. The magnetic brackets on the kamoer wouldn’t let me mount the sensor high enough but with this bracket it’s still there in case of overflow. The bracket is sturdy and doesn’t interfere with the appearance of my setup.
Customer image
Joe
5.0 out of 5 stars Described perfectly
Reviewed in Canada on March 14, 2021
I bought this product for the bracket. I used the bracket for lifting my high level sensor on my automatic top off. The magnetic brackets on the kamoer wouldn’t let me mount the sensor high enough but with this bracket it’s still there in case of overflow. The bracket is sturdy and doesn’t interfere with the appearance of my setup.
Images in this review
Customer image Customer image
Customer imageCustomer image
Rob Hulland
5.0 out of 5 stars Great for for a extra safeguard measure
Reviewed in the United Kingdom on January 30, 2021
Color: ATO system(PC bracket)Verified Purchase
I bought this as an extra measure to prevent my auto top up from flooding my lounge if the sensors fail . The float valve is height adjustable , well made and does the job . I have connected my auto top up pipe straight onto the pipe connection without using the push fit connector. 👍🏻
Customer image
Rob Hulland
5.0 out of 5 stars Great for for a extra safeguard measure
Reviewed in the United Kingdom on January 30, 2021
I bought this as an extra measure to prevent my auto top up from flooding my lounge if the sensors fail . The float valve is height adjustable , well made and does the job . I have connected my auto top up pipe straight onto the pipe connection without using the push fit connector. 👍🏻
Images in this review
Customer image
Customer image
2 people found this helpful
Report
Randy Glidden
5.0 out of 5 stars Above expectations
Reviewed in Canada on February 2, 2024
Color: ATO system(Acrylic bracket)Verified Purchase
Build quality was very good