Rough in plumbing for future use?

[JOsmund999]

Getting close to submitting for my permit. I don't have near term plans for a bath but was thinking it may be wise to plumb for a 3/4 bath. I have water on the property but no plan for a septic system. If a toilet is ever installed, it would need to be a tank and pump system.

I'm thinking a line for a toilet, sink drain and shower drain, then just run them into the dirt with caps on both ends. Is there anything more to it? Is there any reason to tie them together under the concrete?

Thanks in advance.

 

[Stuart in MN]

If you do, also make provisions for the vent stack and a stub for water into the building.

 

[Altair Sinclair]

Your permitting agency is likely to be very suspicious of a toilet wastepipe without a septic system.

Heck I'd be surprised if they allowed you to run water to a permitted building without any drains leaving the building. You're basically admitting that any wastewater will be going into the dirt.

 

[Sawlog]

Tie them together under concrete and exit the foundation with 4in sch 40 pvc. Make sure you put a floor drain in too.
You don't have to run your waterline yet, but at least put a thimble in for it. Later you can dig up the end and run your line though it.

 

[JOsmund999]

Tie them together under concrete and exit the foundation with 4in sch 40 pvc. Make sure you put a floor drain in too.
You don't have to run your waterline yet, but at least put a thimble in for it. Later you can dig up the end and run your line though it.

Good call on the floor drain. Thanks.

 

[JOsmund999]

Your permitting agency is likely to be very suspicious of a toilet wastepipe without a septic system.

Heck I'd be surprised if they allowed you to run water to a permitted building without any drains leaving the building. You're basically admitting that any wastewater will be going into the dirt.

If the building will be around for 50+ years, someone, someday may wish to add a bath. Perhaps me in a few years. I would think they would allow for the infrastructure now as a cost savings later but I have little experience with permitting and know they can be sticklers.

 

[JOsmund999]

If you do, also make provisions for the vent stack and a stub for water into the building.

I'll need to figure out just what this would look like.

 

[Uncle murph]

Getting close to submitting for my permit. I don't have near term plans for a bath but was thinking it may be wise to plumb for a 3/4 bath. I have water on the property but no plan for a septic system. If a toilet is ever installed, it would need to be a tank and pump system.

I'm thinking a line for a toilet, sink drain and shower drain, then just run them into the dirt with caps on both ends. Is there anything more to it? Is there any reason to tie them together under the concrete?

Thanks in advance.

The only difficult one would be the toilet flange,I’ve seen several times where the owner held the flange 3/4” below the floor level,covered it with duct tape and then poured right over it,absolutely concealing it from prying eyes.Measure its location carefully. I know in one case the owner did eventually make use of it,2 minutes with a hammer and he was ready to set the toilet.Not recommending anything,just commenting on what I’ve seen.

 

[Leaflessshadetree]

If you know for sure what the layout will be then go ahead and install that much of it. If you aren't doing in-floor heat it isn't that big of a deal to bust out a little concrete, dig and install plumbing later.


I never wanted a floor drain. The contractor was pretty proud of himself by telling me he "snuck" the plumbing for one in (as if he did me a favor). In my area many contractors, inspectors and others say that flood drains aren't allowed.
I looked a little deeper and found what I think was the regulation stating that floor drain required an oil/grease trap.
The contractors (and inspector) just assumed that no one would pay for that.

 

[larry4406]

The only difficult one would be the toilet flange,I’ve seen several times where the owner held the flange 3/4” below the floor level,covered it with duct tape and then poured right over it,absolutely concealing it from prying eyes.Measure its location carefully. I know in one case the owner did eventually make use of it,2 minutes with a hammer and he was ready to set the toilet.Not recommending anything,just commenting on what I’ve seen.

For the toilet, use a 4x3 reducing elbow in your groundworks with the 4" stubbed up and glued in place wafer test cap (pic below). Set it just so the wafer test cap is just below the slab surface so the cream can skim over. Easy to bust out later.

A normal 3" PVC closet flange nests inside the 4" pipe just fine after you radius the inside edge of the 4" pipe.

 

[Jackfre]

As long as you are asking about “Future” use spend a bit of time looking at where you might want to sleeve the foundation for other services. Add a couple empty capped off sweeps up under your electric panel. It is a simple matter to add sleeves prior to the pour. I’d skip the floor drains too and yes tie them together and run the capped vent up into the attic.

 

[Weirth It]

When planning for my Shop I knew I wanted a sink and water heater. No need for a Mens Room as there are plenty of bushes to water outside. Also knew the county would require I tie into and expand the existing drain field with any pressure water, both of which are not reasonable. The existing drain field is on the other side of the property and would require a pump making tying in very difficult. Expanding the drain field would cost too much $$$ with design and hiring an installer. In order to have pressure water and a drain without tying into the existing drain field I had to have a place to run plumbing into and out of Shop without the county knowing. Sleeves through the stem walls were not an option.

The county requires a footing inspection prior to pouring the footing. Once we passed the footing inspection I (meaning my son and neighbor, I was out of town) dug in two 4-inch PVC pipes under the footing forms and covered them with dirt so the county would not see them for the stem wall inspection. Once the stem wall inspection was complete we dug up the pipe and added 90-degree elbows that extend about 1/2-inch below slab grade. The concrete guy poured right over the top and so I can break through and have a path for pressure line and drain. Now I just need to figure out how to get pressure water from house to Shop. Here's a few pics.

 

[larry4406]

Use gray electric PVC conduit and keep it in plain site?

Latter glue your plumbing PVC fittings to the electric PVC conduit?

 

[jack stand]

If you decide to do part of it, do it all. 100% under slab complete including water supply and venting.
I'd keep it discreet myself but take pictures. A lot of guys will cap off waste lines below the slab then turn a 5 gallon bucket upside down and level with the finished slab. In your situation I don't see a problem leaving the bucket several inches below the surface. This makes for a simple concrete fix later on. Don't crowd the plumber, he needs the space to work a make minor adjustments coming up through the slab.

 

[JOsmund999]

Great feedback Folks.

Thanks you all!

 

[mcbane]

I put underslab plumbing in my shop for potential future full bathroom. To keep open the option of building that bathroom legally, I showed the plumbing on my permit drawings and got the county sanitary engineer to sign off that it was ok with respect to clearance of sanitary line vs wellhead and that connection to existing septic system would be ok.

 

[nh_yota]

Whatever you do take a lot of reference pictures for yourself, because if you are anything like my father you will remember things entirely differently years from now.

 

[HoosierMark]

My friends run the lines under the floor to the spot they want the pipes in. Cap them off about two inches below the floor level. Put a piece of foam over it about an inch below then pour the concrete. If you want to use the plumbing it can easily be broken out. Patch the area around it after you connect the plumbing. If notused, you have a smooth floor. One friend started working on his before the final inspection. He just stuck some bales of straw over them and told the inspector it was to keep it dry until the backfilling settled and he could spread it.

 

[Sawlog]

I don’t know how you guys deal with all the permits and inspections.
We live in a small town of 200 or less, when I want to build something then I just build it. The tax assessor will find it soon enough. But we have no permits or engineering, inspections etc.
the only thing in our area that legally is supposed to get inspected is plumbing and septic. But that like 1 out of a 100 that do. Definitely not in the rural areas like ours.

 

[Professor Fate]

No permitting agency should have any problem with you running water to the garage. Show a hose bib on the plan. Show the toilet on the plan and label it "rough-in for future bathroom". All perfectly legal.

 

[Dreamer1975]

I plumbed mine in before concrete. Not sure I will every use it but it’s there just in case. But it does come in handy because it’s now used as a drain for a makeshift urinal going directly out side. Not sure it’s legal but what’s the difference in going around the side or doing it in the heated shop while it drained out.

 

[dcg9381]

No permitting agency should have any problem with you running water to the garage. Show a hose bib on the plan. Show the toilet on the plan and label it "rough-in for future bathroom". All perfectly legal.

Various places won't finalize a permit with "rough in". Some don't care at all. It'll depend on where you are.

 

[48windsor]

Your permitting agency is likely to be very suspicious of a toilet wastepipe without a septic system.

Heck I'd be surprised if they allowed you to run water to a permitted building without any drains leaving the building. You're basically admitting that any wastewater will be going into the dirt.

Frenchdrain

 

[48windsor]

My shop is prob 20 feet off house, Masterbdrm .
I tapped ito Pex, ran to shop. I had stubbedout for. And a 2in. drain which flows out to a barrel filled with rock 4ft in ground.

 

[NUTTSGT]

We had a spammer in our midst which is now gone along with another one sharing the same IP.