sewer vent out side wall?

[jgorm]

I have a 3" vent that I need to do something with. It's currently in the way and needs to be routed a few inches towards the wall at a minimum. It's stubbed out the second floor above the office in my shop. My permits are signed off already, but I don't want some janky BS in there. It's a 3" vent for a toilet, shower, bathroom sink, and garage sink, all located in the shop. The main line Y's into the main sewer that my house feeds into. I've thought about stubbing it out the side wall, and turning it up a foot or so. It will be 10+' off the ground, on my side yard where nobody is. It's been open for nearly a year now, and I don't notice the slightest smell, even with my nose right up to it
I'd rather not run it out the roof because I'm worried about causing a leak on the low side of the metal, even with one of the flexible vent flange things. No matter how I do it, there would be one channel on the roof that would hold water against the flange. If I vent it out the side, this wouldn't be an issue. In this picture, you can see the black vent going about half way up the back wall.

Here is is from another angle.

This is an outside view and it would pop out behind that tree. There are giant gutters that would make it tricky to extend above the roof. The peak is 19' for reference.

 

[readhead]

There are flashings made for metal roof profiles. Installed with butyl tape and screws it will not leak.

 

[KRB52]

Can you do that per building code? I get the feeling the answer is "no"; might have something to do with health from "germs", smell and possibly safety, since methane gas is flammable and / or explosive. Maybe you can run it out the side and then up so that it vents above the peak of the roof?

 

[nehog]

There are flashings made for metal roof profiles. Installed with butyl tape and screws it will not leak.

This, or when they did my house's metal roof, they put a piece of metal to channel the water around the vent pipe. (They also used a special flashing made for the type of roof they installed.)

 

[csp]

No, it is against code to go out a sidewall. It has to be out the roof in order for it to draft properly.

 

[barks]

Slap an 'air admittance valve' on it and call it good.

 

[7th Kahuna]

I too vote to take it up through the roof. You certainly don't want to leave it inside, even if it doesn't smell now. It's already potentially unhealthy and you never know what the future may bring. Every now and then the city does something around here that just stinks up the block. I can smell it walking around outside. I'd hate to have it indoors.

Properly done it shouldn't leak but penetrations do eventually require maintenance so keep it near the edge where you can get to it with a ladder. Plan on going up every few years for a look.

 

[BADSIX]

I can't imagine no smell coming from the pipe. must be a low spot somewhere holding water that's acting like a trap. you'll be up to code if you go outside and then up through the roof. i'm doing this on a 2 story house i'm working on .
Jay D.

 

[K'ledgeBldr]

You can do any of the three- through the roof, wall, or AAV; whichever you feel more comfortable with.

Through the roof will require a flange boot for that specific roof

Through the wall not a problem either. It's only a code violation if there's a door or window above- I don't think you have anything to worry about there!

AAV is a very simple remedy without having to make any penetrations in the building's envelope. Just remember they are susceptible to failure.

 

[wssix99]

You should have no problem doing this on the wall. (I just built my house like this, so we could have a zero penetration roof.) You'll just have certain heights you'll need to achieve with the vent and certain clearances you'll need to maintain from the eaves and doors. Your local code should give you the parameters to do this math.

You can also get nice PVC vent hoods for the termination on the wall. (There are also metal versions (in all finishes) you can get that will attach to PVC pipe:

 

[csp]

AAV is only allowable if there is an existing vent to atmosphere, allowing sewer gases to escape the building. It can't be the only vent in a sanitary sewer system.

The OP doesn't have any other vents in this building.

 

[Jess]

Take it all the way to the ridge and put a rubber flashing with the high side under the ridge cap, seal the sides and bottom with butyl tape. A couple of roofing screws will hold it in place permanently

 

[GSRinmyCRX]

since you already have your permits I would just run it out the side. codes can be overkill some times and if this is just a shop with less use than typical house you will be fine. I would not recommend a AAV I have had 2 fail on me.

Levi

 

[K'ledgeBldr]

AAV is only allowable if there is an existing vent to atmosphere, allowing sewer gases to escape the building. It can't be the only vent in a sanitary sewer system.

The OP doesn't have any other vents in this building.

Love to know where you got that(?)

918.3 of the IPC says otherwise.

 

[jgorm]

I can't imagine no smell coming from the pipe. must be a low spot somewhere holding water that's acting like a trap.

Nope, no low spots.

Take it all the way to the ridge and put a rubber flashing with the high side under the ridge cap, seal the sides and bottom with butyl tape. A couple of roofing screws will hold it in place permanently

That would be a major pain with all the metal girts in the way, but it would achieve a more permanent seal.

since you already have your permits I would just run it out the side. codes can be overkill some times and if this is just a shop with less use than typical house you will be fine. I would not recommend a AAV I have had 2 fail on me.
Levi

I'm leaning that way.

Thanks for all the tips!

 

[Falcon67]

You can 45 it however you'd like, but agree that it needs to be above the roof line to vent properly. Our old house had two vents - one washer drain, the other kitchen - that ran up the outside of the house. The washer drain used two 90s at the top to loop it under the eve. Yes, you could pick up the vent smell on that side of the house. I cut the pipe and penetrate the roof up about 24" which solved the issue.

 

[readhead]

Offset the pipe so that it lands in the center of a low and run it through the roof. It's done every day. You are spending more time trying to figure out an alternative when the easy way is to send it through the roof just like your house.

 

[kbs2244]

In San Diego you are worried about rain?

 

[psjoyal]

If you do go outside with it and get odor, you could try this: sweetair.com

 

[wssix99]

I can't imagine no smell coming from the pipe.

If you are wise and pure of heart, your poop doesn't smell.

 

[Tunajoe]

Can't help you with the vent question , but don't forget some blocking for toilet paper holder, towel bar etc.



Sent from my iPhone using Tapatalk

 

[csp]

Love to know where you got that(?)

918.3 of the IPC says otherwise.

No, it doesn't. 918.3 only says that AAVs are allowed.

Here's where I got it:

Within each plumbing system, not less than one stack vent or vent stack shall extend outdoors to the open air.

 

[Bib Overalls]

The vent for the small two fixture "facility" in my shop actually originates just outside the slab and runs up the outside back wall to a point a couple of inches above the roof. My shop is clad with grey metal and I used grey electrical conduit to match and for it's UV resistance. Really blends in. There is nothing in the "code" that prohibits painting the vent to match the walls.

 

[BADSIX]

Nope, no low spots.

That would be a major pain with all the metal girts in the way, but it would achieve a more permanent seal.

I'm leaning that way.

Thanks for all the tips!

I was thinking a low spot or sag in the piping to the main. p.s. are you on city sewer.
Jay D.

 

[BADSIX]

No, it doesn't. 918.3 only says that AAVs are allowed.

Here's where I got it:

correct, I just had an inspection and and he said you must have a vent stack to out side to use the aav's. i'm using aav's in the master bath sinks, the toilet and shower are vented outside. as it should be .
Jay D.