What you have with that Tee set up is a mono-flow fitting or a simple venturi the larger pipe has water moving by the smaller opening so fast it actually is creating negative pressure on the smaller barbed fitting and is sucking in air. What you could and the only thing you could do is the restrict the water above the tee to create back pressure then it will go out of that 3/16th barbed stub..
As for the DIY video Nope that is nothing more then an inverted anti-siphoning S trap. And they are used on older homes with no venting to the Lavatories and when they have about totally drained the sink bowl they suck air and almost shake the bowl they pull so hard to break the siphoning vacuum. i could not live with that noise all the time.. If any of y'all ever lived in a older house and saw that huge chrome trap under a sink that went down through the floor then you know the sound.. _________ Some of the world's greatest feats were accomplished by people not smart enough to know they were impossible (Doug Larson) |