Threlaco 2 Pack Air Release Valve 3/4 Inch Air and Vacuum Release Male Thread Air Relief Air Bleeder Valve Vent Irrigation Water Saving System for Agricultural Drip Systems

Bought these to vent air from rain barrels and they work great. One had a small water leak when first used but it eventually seated and has worked fine since.

Have worked well for my roof solar pool heater

Great product. These worked perfectly in stopping the siphoning problem on our citrus orchard. Placed two on each high spot in two zones that were having issues. No more pressure pump turning off due to siphoning itself dry.

It did not work in my application mounted horizontally so reinstalled the existing one and not using… Leaked too much water when the solar on roof started filling or running or shutting off

Great for exterior usage. Does leak some water right as the water pressure reaches it, why I couldn't give it 5 stars. Great on water lines that need to be drained during the winter, by shutting off the water and opening a valve this unit will release the pressure and allow the lines to drain. When filling the line, it will allow the air to escape. Good value for the money. Will see how durable this unit is over time. Currently have one set up on a pool drain to insure that the line drains completely .

These valves work as they should. No problems.

Works just as well as the expensive name brand item. Have to wait to see how long it lasts.

VERY GOOD