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Aquatic Life

Valve Kit for Reverse Osmosis and Deionization Aquarium Systems

  • Based on 395 reviews
Condition: New
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Availability: In Stock.
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Arrives Tuesday, Oct 27
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Features

  • COMPLETE HANDS-FREE FILL KIT: Includes float valve, shutoff valve, check valve, and tubingeverything you need to automate your reverse osmosis and deionization system and stop overflows
  • UNIVERSAL COMPATIBILITY: Works with any standard 14 tubing and connects via 12 MPT to your setupideal for home water systems, hobby aquariums or large tanks
  • CONSERVE WATER AND TIME: The float valve automatically shuts off when your tank reaches the desired levelno monitoring required and no wasted water
  • DIY FRIENDLY INSTALL IN MINUTES: Press-fit fittings, tubing that snaps in, and no special tools needed; Ideal for reverse osmosis and deionization home water systems, aquarium ATO (auto top-off), large container fill-ups, and water change tanks
  • QUALITY MATERIALS: Rated for up to 80 PSI and constructed from quality materials; Automate your system and streamline your workflow with an efficient addition to your setup

Description

AquaticLife Auto Shut-Off Float Valve, 1/4-Inch AquaticLife Auto Shut-Off Float Valve Kit for RO and RO/DI units will allow your reverse osmosis system to automatically turn on and off based on the activation of a float valve. This auto-fill float valve kit allows you to fill large tanks, containers, and aquariums automatically. Float valves are simple to install and can save a lot of water. The water fill float valve connects directly to faucets. The adjustable float is threaded with a ½" MPT connection and attaches to any standard reverse osmosis system that uses 1/4" tubing using the included ½” FPT to Press-Fit adapter. If you’re using this kit with a reverse osmosis or RO/DI system, you WILL NOT need any other components. This RO float valve kit includes the necessary RO auto shut-off valve, check valve and tubing. Minimum Operating Pressure: 40 PSI. Maximum Operating Pressure: 80 PSI. Unsurpassed Quality And Satisfaction AquaticLife manufactures premium-quality products. Every product that goes out the door meets our highest quality and standards.

Material: Brass Or Bronze


Brand: Aquatic Life


Item dimensions L x W x H: 6 x 4 x 2 inches


Inlet Connection Size: 0.25 inches


Inlet Connection Type: Press


Outlet Connection Type: Press


Maximum Operating Pressure: 80 psi


Number of Ports: 2


Outlet Connection Size: 0.25 inches


Number of Packs: 1


Product Dimensions ‏ : ‎ 6 x 4 x 2 inches; 0.32 ounces


Item model number ‏ : ‎ 500300


Date First Available ‏ : ‎ January 21, 2014


Manufacturer ‏ : ‎ Aquatic Life


Best Sellers Rank: #36,997 in Pet Supplies (See Top 100 in Pet Supplies) #357 in Aquarium Filter Accessories


#357 in Aquarium Filter Accessories:


Customer Reviews: 4.5 4.5 out of 5 stars (395)


Brand Name: Aquatic Life


Model Number: 500300


Number of Packs: 1


Global Trade Identification Number: 04


Unit Count: 1 Count


Item Highlight: Automatically maintains reservoir water level by stopping purified-water flow when the container is full


Manufacturer: Aquatic Life


Manufacturer Warranty Description: Manufacturer Warranty


Number of Items: 1


UPC: 810957013004


Included Components: Aquatic Life Automatic Shut-Off Float Valve Kit - .25"


Item Type Name: Multi, Model 500300


Item Weight: 9.07 g


Number of Pieces: 5


Set Name: AquaticLife Auto Shut-Off Float Valve Kit


Manufacturer Part Number: 500300


Inlet Connection Type: Press


Outlet Connection Type: Press


Maximum Pressure: 80 psi


Number of Ports: 2


Thread Size: 1/4 inch


Thread Type: Press


Connector Type: Press


Valve Type: Float Valve


Item Dimensions: 6 x 4 x 2 inches


Inlet Connection Size: 0.25 inches


Outlet Connection Size: 0.25 inches


Size: 5 Piece set


Material Type: Brass Or Bronze


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Oct 27

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.

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Similar Products

Top Amazon Reviews

    • Good
Working great
Reviewed in the United States on August 23, 2026 by Edgar Rodriguez
    • It works as advertised
It works as advertised. I use it with Aquatic life reverse osmosis system to make water for my fish tank.
Reviewed in the United States on August 26, 2026 by James Richardson
    • Hands down #1 thing anybody in reefing should have...
Ok so after about 7-8 years of reefing and always using an rodi system I've never had an auto shutoff, I've had floats that would stop the water and it would just keep going through the waste line down the drain. It turn I was changing filters more frequently. Also I know I'm not the only reefing who has flooded a room or rooms on their house due to forgetting your rodi is on 😂 it's not if your going to it's when your going to! Needless to say this float and shutoff are honestly top quality for your rodi system. It fills my bin up once the float shuts fully it builds pressure into a diaphragm inside of the shutoff which closes the feed line into your rodi. So no more just wasting filters and good water. It's cut my water bill down, buying less filters less frequently, 100% worth the money you'll spend because within 6 months you will be saving the same amount if not more on wasted water alone not including buying more filters. Again this is a hands down must in my opinion for reefing or anything your using an rodi system for to fill up a container that you may forget. No more overflowing or wasting water. Will be using these from now on as long as I use an rodi system. ... show more
Reviewed in the United States on July 21, 2023 by Lit Pix
    • exactly as advertised, works great
exactly as advertised, works great. Complete kit ready to install, if you’re looking to for a way to periodically fill your auto top off fresh water system this is a good setup. For best efficiency you want to run your RODI for a long time, instead of short bursts. Let the ATO tank get down to 1/4 full then turn on your RO/DI and walk away. This gives peace of mind your ATO tank won’t over flow. When its done turn off the RO/DI feed. ... show more
Reviewed in the United States on February 5, 2026 by Pitogo
    • Works great if you get all the pieces
This product works great, if you get all of the pieces. I say this because I did not realize I did not have all of the pieces for this until it was all hooked up and water was all over my kitchen floor. The product itself did what it was supposed to do. When the water level reached the configured cut off level the water stopped flowing into the reservoir. As soon as this happened the hose shot out of the float bulk head connection. It seems m package arrived with a couple of pieces missing as evidenced from the product picture. It was missing the little blue clip that locks the hose in and it looks like there was another piece that the blue clip would actually attach to. Other than that, I highly recommend this product. ... show more
Reviewed in the United States on December 10, 2022 by leo satterwhite
    • Would recommend
After trying another brand ACV I went back to aquatic life. Solid, works as it should and for the parts you get well worth it
Reviewed in the United States on April 2, 2026 by Steven K.
    • So e z to use
Easy to install works perfectly that's what it's supposed to do
Reviewed in the United States on February 3, 2026 by Daryl Joseph Sr
    • Completely flooded grow room twice
Review Image by Bob M.
Review Image by Bob M.
Review Image by Bob M.
I woke up this morning to my grow room with 3 inches of water in the bottom because this float valve once again did not turn off the water. This happened once before but luckily, I caught it when there was only about an inch of water. I stopped relying on it and would set a timer to remind myself to turn off the RO water. Yesterday I turned on my RO system to fill the reservoir up but forgot to set a timer and woke up to this mess this morning. Boy what fun it was to try to clear that out. This thing is absolute garbage. Do not trust it. If you can see from the third picture, it's kinda hard to tell, but there's about 3 inches of water across the whole floor of my tent. ... show more
Reviewed in the United States on September 27, 2026 by Bob M.

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