It's expensive, but I'm glad I have it. There may be something else that does the same thing, but I did not find it. I just installed an instant hot water delivery system throughout my house that involved me installing a "loop" of pipe under every faucet, and a pump to push the water back into the bottom of the water heater. This flow indicator gives me a visual indication the pump is operating normally, and it looks nice. I'm glad I have it. It exceeds the pressure and temperature requirements that I need nicely, and I don't worry about it leaking or bursting.