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Plumbing Loop Vent Ebook
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Oct 23, 2024
Tim Carter, Founder of AsktheBuilder.com, describes a plumbing loop vent. Click her for the plumbing loop vent ebook: http://shop.askthebuilder.com/how-to-make-a-plumbing-loop-vent/ Discover more plumbing videos and columns at askthebuiler.com: http://www.askthebuilder.com/category/videos/bathrooms-videos/plumbing-design-videos/ http://www.askthebuilder.com/category/qa/bathrooms/plumbing-design/
View Video Transcript
0:04
Hi, I'm Tim Carter from, as the builder.com. And I want to show you this very basic and kind of um
0:10
out of scale loop vent that I created. Look at this. Now
0:15
what you're gonna see up here, you see up here, this is the top of the loop vent. And this part here would be right
0:21
up underneath the counter, top of the island sink or whatever sink
0:26
you know, you're trying to vent. And what happens is I've got this
0:30
this loop in here much narrower than it would be in real life
0:34
But I did that just so we wouldn't waste material, but here's what you need to look at
0:38
Come down here, look at this. So you'll understand this. I'm sure you've seen this part of the plumbing system in your kitchen cabinet
0:46
This is just a regular pee trap and you can see what typically happens is the water right here
0:51
Look up here. You can see right here. This is where it would connect to the sink
0:55
The water enters the plumbing drain system. Here comes down, goes through here
1:01
You can see here it enters in the stack. It goes down down down
1:05
down makes a 90 goes through, here, goes through here and it eventually heads over to the sewer or your septic tank
1:13
So that's what the water does. Ok. But now look at this
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this is what you need to understand. Let's think, let's forget about this part
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this entire part of the piping right now over here. Let's imagine that this was the most simple plumbing drain you've ever seen in your
1:29
life. What would happen would be, we'd have the pipe in the wall here
1:34
This is the drain part of the pipe right here. But from here where my hand is up would be the vent pipe and see
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this vertical pipe right here. Just imagine that this pipe here would go straight up through the wall and poke straight up through your roof
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That would be the most simplistic vent system that you could have
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And what would happen is is when rushing water comes into this pipe goes down and it's completely filled
2:00
Like you have the full sink of water, you pull the plug and this completely fills with water
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This pipe, it goes over here and it starts to go down here and it's pushing all this air out of the way
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Well, right through here through this vent pipe, it's sucking the air from the roof
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All right. Now, how does that work in a loop vent? Remember because we're in an island cabinet
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We can't get this pipe, you know, through the roof or it's gonna look kind of ugly in your kitchen
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right? Can you, can you imagine a pipe sticking up through the middle of your island going to the ceiling
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It'd be crazy. Here's what happens. Same system the water goes down through here by the time when you're down here
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by the time the water gets down to this part of the pipe, it's not filled the pipe completely
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There's actually may maybe the water levels up to about here. So there's air on top of it
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So is the water rushes this direction towards the sewer? It can pull air back this way through the plumbing
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system because remember this pipe is not filled with water and that air comes up here
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It comes up through here, goes across the top of the loop and comes down this pipe as if it had come from the roof
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It's that simple. That's how a loop vent works. I'm Tim Carter for as the daughter.com
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If you want to discover more home improvement tips. Go to ask the builder.com
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