Any Plumbers here?

[txturbo]

I'm getting ready to install a bathroom in my new shop. I didn't put any plumbing in the slab because of all the extra time and cost it was going to take.
My plan was just to use a rear discharge toilet that bolts to the floor and go straight out the side of the building with the sewer line. Im also going to have a loft living area with a bathroom and kitchen. Now im wondering if I should keep the DWV lines inside the building until it gets to the point where it ties into the line going to the septic tank.

 

[ddawg16]

Toilet drains are not the thing you want to take short cuts on....you don't want to end up with a ****** mess (pun intended)

You can go external....that is what they did 100 years ago as they started to add indoor plumbing to existing houses.

Make sure you get your P-traps correct for the sinks and size the toilet pipe properly.....and have the proper slope.

To be honest....adding the plumbing prior to pouring the slab would have been a lot cheaper than what you are doing now.

 

[txturbo]

not in my county...

 

[matt_i]

Typical solution is to saw cut and breakout the slab. Do your digging, set pipes, then repour.

 

[Dirtydan69]

Check out saniflo. https://www.saniflostore.com/main.sc?gclid=EAIaIQobChMI4O6RofLl2wIVEpR-Ch0dtQouEAAYASAAEgKzXPD_BwE

I’ve used them in numerous situations over the years with great success. Do not use a GFCI.

 

[txturbo]

I’m not cutting the slab....all plumbing is above the slab. I already have the rear discharge toilet..... my question is about the plumbing......should I keep it inside the building or run it all outside.

 

[dfiler2]

I think I would run it on the outside, it would be pretty easy to box it in if needed. Seems to me it would be harder to hide running it on the inside.

 

[59 wagon man]

you would need a back outlet bowl either floor or wall mounted but you need a carrier inside the wall and if i remember correctly it needs a 10" wide wall to conceal the carrier

 

[johnnyradiant]

not in my county...

You said not in my county. I'm curious as to what or why that is. I get that you got what you've got a plan and materials and you are just asking inside or outside. I am just asking to learn something as to why it is 'not in your county'.

 

[dave_dj1]

Here ya go....https://www.envirolet.com/enmulsys1011.html

 

[txturbo]

You said not in my county. I'm curious as to what or why that is. I get that you got what you've got a plan and materials and you are just asking inside or outside. I am just asking to learn something as to why it is 'not in your county'.

They wanted more money, another permit, have to hire a licensed plumber and more inspections just to put one toilet in. As it was it took almost a year just to get the slab poured.

 

[txturbo]

I’m not worried about hiding the plumbing, I just wanted to know if there is any reason for not putting it outside other than maybe exposure to UV.

 

[yeldogt]

They have to do that in the city ... and it freezes. I'm sure in a new building there is some sort of code ..as there aways is. But, it obviously works ... because you see them all the time.

CI is always a possibility for exposed pipe --

If this is the old style tank/bowl porcelain units -- make sure you have an extremely strong wall attachment. The new wall toilets with the in wall tanks and carrier are a different story and take care of the problem.

 

[Bopbop]

I’m not worried about hiding the plumbing, I just wanted to know if there is any reason for not putting it outside other than maybe exposure to UV.

I am not a plumber but I am a plumbing design engineer designing commercial and industrial buildings. From reading your post I assume that you are going to install a floor mount back outlet fixture. If that is the case you should have no chase or support issues.
In the International Plumbing code I cannot find any reason or code that would not permit you to install the piping exposed. The code does address that you have to provide freeze protection if that could be an issue. We have done renovation work to a lot of buildings that have the waste piping exposed on the exterior.
Before I did anything I would contact the Authority Having Jurisdiction, the locale building / plumbing inspector to verify that there is not a local code that would not allow this. If there is then find out if they would allow boxing in the piping to conceal it on the exterior.
I would also be concerned about the UV damage to the pipe. Prime and paint the pipe to provide some type of protection from the UV.

 

[b-boy]

you would need a back outlet bowl either floor or wall mounted but you need a carrier inside the wall and if i remember correctly it needs a 10" wide wall to conceal the carrier

Not necessarily. They make self contained, rear-flush toilets that don't require a carrier. They are popular out west.

I have one. I'd prefer to have a regular toilet, but the plumbing in my basement was already run above ground.

They tend to leak. I use a thick neoprene gasket with silicone sealant to keep it from leaking. Make sure you secure it to the ground. The less movement, the better.

 

[txturbo]

Here ya go....https://www.envirolet.com/enmulsys1011.html

I already have a toilet