This was perfect! Today the electric went out and it did its job!
Looks well made. Will need to see how it holds up. My old ones from a different vendor clogged up over time with use as my tanks are located outside in a fairly open terrace area so dust tends to make it's way into my air pumps.
Seems like it will work when I need it to.
Great product, very happy!
Although this is an inexpensive product, it seems to be effective and well made. I have been using these for a couple months now and have determined that I can trust them. I have tested them by attempting to get back-flow. I have tried to induce a siphon similar to what would happen with a pump failure and found no leaks. With pressure far beyond normal siphon pressure they hold tight. Also important, they do not induce abnormal pressure in the forward direction. I trust these valves.