2 Pieces 1/2 Inch Side-Entry Built-in Embedded Float Valve Automatic Water Level Float Valve Water Level Control Float Valve for Water Tanks, Cisterns

Thankfully they send these in pairs because one of them failed and some of my chickens almost died of dehydration before I replaced the other.

Perfect for an outdoor fountain or pond. Small, hidden (protected) valve action will keep valve from getting stuck open.

The vent allows water to enter on top of the valve keeping it open. This causes an overflow condition in the vessel.

Good product !!

Would be a really cool product but broke after a month or so. I’m not even using my full house water pressure

One of them malfunctioned after one week of use

Does not work!

Works great for keeping my 4 tiered fountain full to the rim!!! Got very tired of hauling buckets of water to the fountain every day. Now I don`t have to do it!