What Is The Difference Between Horizontal And Vertical Plumbing Drain To Vent Connections?

[@philgaudreau662]

Your videos are done so well thanks for so much information had to hit the subscribe button 🍻

[@gregvancom]

Welcome aboard!

[@GregoryGuay]

In this example, can you run a horizontal from toilet to sink under the roof deck in order to reduce to just one roof penetration ?

[@joeduffy3376]

Can you run a washing machine tap through a p trap and then directly to the 4” vertical pipe to act and drain and vent? Looking to finish a basement with one of those for a washing machine drain and another for a water softener drain

[@cornpop7805]

I had a situation where the only place I could vent the toilet was from behind. It worked quite well, but I couldn't find anything written it the IPC, the UPC, or anywhere on the internet, which described this as being an option. I'm glad to finally see it referenced somewhere!

[@timmanson6040]

because its not. you cant put a drain into the trap arm of the toilet. best case is to paralell the drain from the sink and tie it down stream of the vent inlet.

[@gregvancom]

Glad to help.

[@justayoungplumber777]

Thank you very much for sharing a descriptive lesson as this.

[@gregvancom]

You're very welcome!

[@georgereycraft4856]

In the last example, could the wet vent be 2 inch, from the 3 inch combo wye?

[@jimclary-f9l]

Thanks ,my question is if the stack is with in 6 ft of the fixtures do you need to vent them? Small bathroom

[@gregvancom]

Every fixture needs a vent.

[@4everhdt]

Great video and explanation. Thanks 😊

[@gregvancom]

Glad it was helpful!

[@ggc7318]

Thanks for the lesson.

[@gregvancom]

You're welcome and thanks for watching.

[@mbn567m]

Do you have a good example for using 4 in. x 4 in. x 4 in. x 2 in. x 2 in. (Nibco 4870). I imagine is it can combine lavatory, toilet and tub drain and give vertical vent at the same time.

[@gregvancom]

I don't think so. You can check the plumbing section at our website, it might provide some other designs that will work.

[@joeteno4913]

On the last example don’t you have to turn the wyefrom the toilet about 45 degrees so the toilet isn’t dropping down into the air stream of the wet vent behind it

[@hovgh1347]

is this for los angeles?

[@gregvancom]

You will need to check with them, but it should work.

[@brucestorey917]

You cannot vent a toilet in the fashion (horizontally) you have shown at about 4:46 without that vent being a wet vent. With the system you are showing, the vent for the toilet cannot break to horizontal until it is 6” above the flood level of the toilet. In some cases where it is absolutely impossible to vent a toilet or other fixture vertically before reaching the flood level, an inspector may let you do it the way you have shown if you install a cleanout on the vent. But you made no mention of this and your animation does not show a cleanout. You just can’t do it this way without permission and a good reason.

[@vicschauberger2737]

You are correct . That is dry venting and ,in the event of a blockage , effluent and waste can get stuck in that horizontal branch with no wash out . It can be configured that way if it has a lavy upstream washing it out . In that case it's a wet vent , as you said . Also when horizontal branches are pitched at 1/4" per foot . fluids adhere to the inside of the pipe in a circular , scouring motion leaving the center hollow . Not filled halfway with fluid as this video shows.

[@markblaze4909]

Why not just use a San tee for the vent you don’t need the wye.

[@gregvancom]

You can, but my thinking is always design pipes for snake cleaning tools, that's why I suggested the combo fitting.

[@Stevesbe]

Hacked up by the plumber?? No way😊

[@LightGesture]

Vertical i just can't see being a good thing. Big tyrd flopping down into the pipe...