Plumbing ideas

[IPACA9]

Hey plumber guys I'm finally getting around to adding my bathroom under my mezzanine. It's been two years since we replaced our septic system and had a line and water run to the back corner of my shop. I'm using a rear outlet pressure assist toilet that will exit a elbow so I don't have to tear up my slab. My question is my plumbing layout. I'd like to go with a Air Admittance Valve or Studor vent instead of going up through my roof. In my drawing I added them in different areas for options. Would I be fine with just the vent for the sink or would it be better to have more than one?

 

[nmk_61802]

Are you willing to provide access panels at those locations? Can’t bury them in the walls. Can I ask why you don’t want to combine them and take them outside? Really is the best way if you can.

 

[IPACA9]

Oh I'll definitely leave access to them with a removable panel or panels. I know its probably the best way but I really don't want to run a vent pipe up and have to put a hole in my roof.

 

[gsmith22]

i'm pretty sure the use of AAVs still require some form of venting through your roof. every vent can't be an AAV; there has to be some amount of venting through the roof before an AAV can be used. ie they can make up a small portion of the venting but not all of it.

 

[snod83]

Have you considered taking your vent through a wall instead of the roof? Functionally, it just needs access to atmospheric air, it doesn't have to be vertical.

I don't like roof penetrations so all of my plumbing vents go out end walls.... I think you just have to maintain distance to windows to prevent smell issues.

 

[Rusty Wrench]

I don't have a plumbing opinion but to OP, that was one of the best presentations of data I've seen here describing and illuminating the issue you are asking advice for. Dog in the CAD graphic is a nice touch. Just had to say it.

 

[duneslider]

Have you considered taking your vent through a wall instead of the roof? Functionally, it just needs access to atmospheric air, it doesn't have to be vertical.

I don't like roof penetrations so all of my plumbing vents go out end walls.... I think you just have to maintain distance to windows to prevent smell issues.

I believe they need to be at least 10' off the ground, and 10' from doors and windows or 3' above doors and windows. If not vertical they need to have protection from birds and rodents entering and blocking them. I don't think they can be right under a roof overhang either but a little foggy on that one.

 

[IPACA9]

I've thought about that. I already have my 90 percent furnace vented out the side up front. I'm not against venting out the side of my shop plus there's no window or overhang on the side of my building.

 

[IPACA9]

I don't have a plumbing opinion but to OP, that was one of the best presentations of data I've seen here describing and illuminating the issue you are asking advice for. Dog in the CAD graphic is a nice touch. Just had to say it.

ThanksThat's my boy AMMO. Had to add him in there...lol

 

[IPACA9]

I believe they need to be at least 10' off the ground, and 10' from doors and windows or 3' above doors and windows. If not vertical they need to have protection from birds and rodents entering and blocking them. I don't think they can be right under a roof overhang either but a little foggy on that one.

I've thought about that. I already have my 90 percent furnace vented out the side up front with one of these. I'm not against venting out the side of my shop plus there's no window or overhang on the side of my building.

 

[bakmopar]

ThanksThat's my boy AMMO. Had to add him in there...lol

Your Doberman is beautiful. We had one growing up and my parent's had another one when I was in my 20's. Great dogs. Good luck with your project.

 

[flat350]

2"x2"x2" tee at the base of the urinal should be a wye-1/8 bend combo same for the 3"x3"x2" tee at the toilet. Vertical to horizontal and horizontal to horizontal changes in direction should be long sweep. Roll the 2" branch on the 3"x2" fitting at the toilet up on a 22 1/2 or 45 then run to the urinal and the lav. Not much help on the vents as I'm not really a fan of AAV's

 

[IPACA9]

2"x2"x2" tee at the base of the urinal should be a wye-1/8 bend combo same for the 3"x3"x2" tee at the toilet. Vertical to horizontal and horizontal to horizontal changes in direction should be long sweep. Roll the 2" branch on the 3"x2" fitting at the toilet up on a 22 1/2 or 45 then run to the urinal and the lav. Not much help on the vents as I'm not really a fan of AAV's

Good info though. Thanks. I'm just taking it all in and learning myself to it. I'm trying to research if I can vent out the sidewall in Missouri.

 

[ddurrett896]

Skip all those AAVs and add a vent.

 

[75gmck25]

I have a bathroom sink with the AAV's for each sink tucked up under the cabinet. It seems to work fine, and it passed inspection. I made sure they were easy to unscrew and replace, because they apparently "wear out" and eventually lose their seal.

I'm also stretching my memory a little, but I'm not sure you always need a separate vent for a toilet. A toilet is mostly self-venting because air can always enter each time it's flushed. If it's within a certain distance of the main stack (which is a also vent), it may not require its own separate vent.

I also strongly suggest you add horizontal blocking in the wall for grab bars and other devices. A 2x10 or 2x12 centered at about 30" off the floor will cover most needs. You aren't getting any younger, and having something to grab hold of is really convenient if you have an injury or agility problem.

 

[IPACA9]

2"x2"x2" tee at the base of the urinal should be a wye-1/8 bend combo same for the 3"x3"x2" tee at the toilet. Vertical to horizontal and horizontal to horizontal changes in direction should be long sweep. Roll the 2" branch on the 3"x2" fitting at the toilet up on a 22 1/2 or 45 then run to the urinal and the lav. Not much help on the vents as I'm not really a fan of AAV's

I did a new drawing with the info I've collected from thus post and a couple others. This look any better?

 

[larry4406]

I am not a plumber either, but I think you can combine the vents into one and use a single AAV.

On our new houses with 6 full baths, a kitchen sink, a laundry room with sink, powder room, and wet bar, these are all vented with a total of two 2" vents thru the roof (one each side of the home due to the left/right locations of 2nd floor bathrooms).

Our kitchen islands use AAV's if the sink is in it, and the AAV is mounted up high inside the cabinet like @75gmck25 mentioned.

 

[IPACA9]

I've also considered running the vent up near the roof then out the side

 

[PCustoms]

Look at the specs for AAV, they spec how many fixtures they can cover. IIRC you do not need a true vent if your AAV are used correctly.

Will this be inspected? Certain AHJ will not allow AAV, it depends on what plumbing code is in effect. No inspection (in practice) means they'll work OK, just follow the mfg instructions.

Personally I'd tuck a vent pipe inside that wall cavity and then out the sidewalk somewhere convenient. It's just easier and nothing to service down the road.

 

[jsaw]

Your Doberman is beautiful. We had one growing up and my parent's had another one when I was in my 20's. Great dogs. Good luck with your project.

Same Here

 

[thammel]

I have one AAV in my house. Had to put it about 8' up (have 9' ceilings). Simply cover it with return air grill vent cover.

 

[IPACA9]

I have one AAV in my house. Had to put it about 8' up (have 9' ceilings). Simply cover it with return air grill vent cover.

I've got 14ft walls. I could run one or a couple all the way up higher. Plenty of air.
I have one in the house under my kitchen island it works good.

 

[IPACA9]

Decided it's probably best to just quit playing with the AAV idea and vent it. My new redesign.

 

[i4ni]

The Garage Urinal

 

[JJ Quick]

ThanksThat's my boy AMMO. Had to add him in there...lol

Handsome dog! What is his caliber?

 

[IPACA9]

Handsome dog! What is his caliber?

50 Beowolf

 

[IPACA9]

Could use a little direction here. Maybe I'm overcomplicating this. Initial design was to use a cleanout under the urinal and then the 2 inch drain would increase to 3 inch with clean out to 22½ elbow before going into the long turn wye for the rear output toilet which then 90s out my building to the ground. After deciding to put a cleanout under the urinal it dropped my line down so now it pretty much lines up (after ¼ drop per foot for draining) with the 3 inch combo wye without using the 22½ elbow.

Basically I'm asking can the sink and urinal drain be same level as the toilet drain? I photoshopped the drain before the toilet in a picture. I'm assuming they can since they all slope downhill and will empty but every plumbing layout I look up shows a conventional toilet that goes into the floor and drains dropping down. Also do I really need a 3 inch cleanout before the toilet or could I get away a 3x3x2 long turn wye and a 2 inch cleanout? I guess bigger is better though.I

 

[nmk_61802]

Personally I'd skip all of those clean-outs. If you can access the space behind the wall, I'd remove the 90 up to the sink drain and put a combo there with a clean-out plug facing out. This will rod out that entire 2" run. Then I'd put a 3" surface cleanout just outside that exterior wall (building clean-out) which should be a requirement if you don't have it already. Anything not served by those two (unlikely) will need the fixtures pulled.

 

[IPACA9]

Personally I'd skip all of those clean-outs. If you can access the space behind the wall, I'd remove the 90 up to the sink drain and put a combo there with a clean-out plug facing out. This will rod out that entire 2" run. Then I'd put a 3" surface cleanout just outside that exterior wall (building clean-out) which should be a requirement if you don't have it already. Anything not served by those two (unlikely) will need the fixtures pulled.

I got to thinking last night I'd probably have to pull the urinal anyways if something was wrong so why bother with the cleanout.

 

[PCustoms]

Is the urinal really needed or do you just want it for the "my shop has a urinal" factor?

Seems it would simply the layout. I'd rather have simple and lift a lid personally.

 

[IPACA9]

I want a urinal. I have parties, customers, kids, cub and boy scouts for projects I'm hoping a urinal will keep the toilet clean for people that need to sit. My old shop dudes kept peeing on the damn seat or missing the target.

 

[flat350]

An option for more height to play with. Instead of a combo below the urinal put a wye at the corner when it turns to the urinal and put the urinal tee on the 45 branch from the wye then turn the vent up with another 45. The same can be done at the lav if more height is needed.
What type of spud does the urinal have, do you need an IP connection at the wall for it ?

 

[IPACA9]

An option for more height to play with. Instead of a combo below the urinal put a wye at the corner when it turns to the urinal and put the urinal tee on the 45 branch from the wye then turn the vent up with another 45. The same can be done at the lav if more height is needed.
What type of spud does the urinal have, do you need an IP connection at the wall for it ?

I decided to stay with the one cleanout that I have below the urinal and take the larger one out before the toilet. Outside I am going with long wye with a cleanout to run to the septic line

 

[IPACA9]

Nice day to dig but that was some work!

 

[no704]

Put the clean out higher up on the vent stack. Won’t leak when you need to open it.

 

[PCustoms]

I want a urinal. I have parties, customers, kids, cub and boy scouts for projects I'm hoping a urinal will keep the toilet clean for people that need to sit. My old shop dudes kept peeing on the damn seat or missing the target.

Is this commercial space?

 

[IPACA9]

Is this commercial space?

No. Just my personal shop