Rola-Chem570351-T Flowmeter for 2 in. PVC Pipe, Horizontal Installation (Top Mount), 40–140 GPM, PVC/Galv Pipe — Accurate Flow Rate Measurement for Swimming Pools

This was used in my Pool solar water heater and it works great! It was easy to install and esy to read. After installing I could read the flow from 30 or 40 feet away and alway know the unit is working properly.

Do not have anything bad to say about this item works great.

We have fairly hard water here in SoAZ so some calcium scaling is expected and cleaning of components necessary. But when the ball gets stuck, sometimes it's really stuck requiring complete disassembly.... It would be way nicer if there were a way to do even the recommended cleaning with removing the meter from the pipe... and then a way to free up the bobbin/ball without a complete tear down....

Received it within a few day only and installed it on my 3in pipe existing hole. Readings very clear. Very satisfied

installed the product and turned my pump on for 10 min and it worked fine, then shut it off and started again. Upon restart the ball stuck in the bottom. I took the unit off and freed up the ball, but again it stuck on the 2nd attempt, Took the unit off 3 more times and repeated the described process and it stuck every time.I would not recommend this product to anyone with a pool.

works as expected

Brand new out the box and I get different readings all the time on my pool. The float gets stuck all the time and any time the pressure drops for back washing the float has a very difficult time returning to normal. Usually have to take the screw out, relieve the pressure or stick something in it to knock the float lose. I have bought 2 of these and they both do the same thing. Will not buy a third.

Easy to install and haven't had any issues- make sure you know the flow direction prior to install!