Gems Sensors FS-500 Series Polypropylene Flow Switch, Elbow, Shuttle Type, 0.25 gpm Flow Setting, 3/4" NPT Female
M**E
Restricts flow too much.
Have to agree with the other 1 star review. This is expensive for what it is.Basically its a shuttle style flow switch as the description states. Unfortunately, what the description doesn't tell you is the shuttle blocks almost all the flow in the Tee. So yes, it does a very good job of detecting flow. It also does a very good job of making your flow trickle down to almost nothing.