meekoo Float Ball Valve, 1.57 Inch Male Automatic Fill Feed Humidifier Tank Water with Adjustable Arm for Ponds, Livestock Water Trough, Aquariums, Aquaculture, Hydroponics and Reservoir(4 Pack)

Works great

These things are plastic and therefore are easy to break. In the past I would have to turn off the water supply and keep the pool filled by hand until I could get to the pool supply and buy another one. These came in a 4 pack so if one gets broken li have to do is take out another one and screw it into the supply pipe and we're up and running again. Perfect size and when I installed it the pool was full and it didn't leak. Now there's a steady trickle keeping the pool full.

Functions as expected. However... cannot give 5 stars based on description. I ordered these expecting them to be 3/4NPT, not physically measure 3/4 of an inch. They are in reality 1/2NPT. I had to buy adapters to make it work for my application instead of "plug and play".

Works great for the price. No complaints. Do not use in the winter all other seasons it's great

Not worth the hassle. Snapped one of the floats just holding it getting ready to install it. Stripped a nut on the other when it wasn’t tight still. Wish it was a 0 star.

Simple product that does exactly what you want it to.

NPT pipe thread is defined as having a tapered thread, and with specific dimensions. This float's Amazon description specifically states "National Pipe Tapered" for the inlet connection type. IT IS NOT TAPERED, it has straight threads. Also, it is NOT 3/4" as specified, it is a 1/2" pipe thread as defined by the standards (see my attached chart, from the ANSI/AMSE standards. True, the outside tips of the thread are "approx. 3/4 inch" as stated (actually, a bit larger than 0.8"), but that's the outside diameter of a 1/2" pipe, per the standards (see the "Outside Diameter D" dimension on the attached chart). So, if you go to the hardware store and buy a 3/4" PVC NPT pipe with a 3/4" female threaded end, this float will NOT fit it! Too small, and the PVC pipe thread will be tapered, and this float valve thread is not tapered.THAT SAID, it may be possible to use this float on a female 3/4" PVC NPT pipe, with caveats. You can purchase a PVC NPT adapter, 3/4" male to 1/2" female. The float will fit into the 1/2" female side (thread spacing seems to match), and the adapter's 3/4" male side will fit your 3/4" NPT female pipe thread. The 1/2" pipe taper fit may work, if you use the right amount Teflon or PTFE tape. Some reviews have said that an adapter works, and I suspect this is what they mean.I'm just trying to expand upon and help specify what other reviewers have warned about on this float. The listing is very confusing about the pipe size.

it is keeping a constant level in my koi pond so I dont need to add water as it evaporates, relieving me of the constant need to ad water every week FOREVER! Big convenience . I put one on 1/4 inch lines to both of my koi ponds. I have been using brass valves but they go bad and leak or quit every year or so. I hope these live a lot longer than the brass ones.