Rainbird Air Relief Valve, 1/2"

Affordable. Available. Had one blow out in our garden, this was the perfect replacement.

Worked great at the end of a long half inch drip line. It Let all the air out, then it sealed off when the water pressure started to build. Exactly what I needed.

Not stainless or even alloy! IT IS PLASTIC- will not last long in the weather!! Not as described in the description.

This product relieves the vacuum created when the water is shut off and the tubing starts to drain. Helps prevent soil from being sucked up into the emitters. Prevents clogged emitters.

Be aware it’s all plastic But it did the job I had difficulty regarding tightening to the steel coupling.

This does a good job plugging even with low water pressure (better than another spring-loaded one I tried). It hasn't failed yet to plug or unplug (when water turned off.)

works as expected - wife put a little shrub next to it so it automatically waters when the system activates

Defective, fluttered on and off constantly. Did not stay sealed when it should.