Malida Auto Water Filler Power Free Water Level Controller Auto-top-Off Automatic Marine Aquarium Water Changer with Float Valve, Vacuum Water Flow Regulator and Controller Perfect for Adding Water.

The cost of the quick connects and RO certified tubing alone makes this worth it. (I had to pick up one of those push to connect on-off valves for another project at Home Depot for $12.55, and this set came with one thrown in). I had a similar device fail in the open position once, so I paired this with an auto cutoff Ortis WiFi Power Failure Alarm with Water Level Detection to my RO pump (https://a.co/d/9YxxFE7). However, this one seems less likely to fail as the RO water comes out right over the float joint which should keep it from getting salt build up to jam it.

Perfect

I just made the purchase and installed in an aquarium sump. So far it looks good and comes with a few 1/4” connectors, valve, and tubing. You can adjust the height of the float and the float itself. The height adjustment takes some finesse, and the float adjustment uses a Phillips screw. Use one of the included connectors on the float, then your tubing to the connector. So far so good.

Hooked up to my ro system to my reservoir and it worked great kept me from flooding my basement. Fits well to a 32 gal trash can or anything similar. You can adjust the float level to an extent.

Works well!

Installed this in my console humidifier, connected it to an abaondoned ice maker line in the basement and VOILA! The humidifier stays full, the floor stays dry, the collie stays static free and my back stays healthy.

dignity! Using this in a 35 gallon water storage container. My RODI system fills the tank so that I can mix saltwater for my reef tank and this auto water shutoff works like a charm. The float can adjust up or down about 4-5 inches, and the float angle can also be adjusted to further fine tune max water level. I likes! I am very excite!

Will hold back hose pressure no problem