Basement toilet venting question

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BrianM240

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I was left with the setup in the attached photo from the previous owner; if I were to install an up-flush toilet to discharge to the 'proposed toilet discharge', will it vent properly given the current setup and be to code? There was already a sink there (took it out for the photo) that was running and draining fine, so I think adding a toilet to the same line wouldn't be an issue, but want to make sure first.

Basement Plumbing Labeled 2.jpg
 

Cacher_Chick

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What is with the fitting in the "vent" up at the ceiling? The drain might be able to be used, but the existing piping needs to be cut out and installed correctly. The toilet drain cannot flow past the sink drain, even if it were properly vented.
 

Stuff

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Please consider the option of "rip it all out and start over."

Why not consider a rear discharge toilet? Upsize the piping to 3", add a real vent and be done with it. Much cheaper than an up flush.
 

BrianM240

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What is with the fitting in the "vent" up at the ceiling? The drain might be able to be used, but the existing piping needs to be cut out and installed correctly. The toilet drain cannot flow past the sink drain, even if it were properly vented.

The fitting up top is sealed off, I believe it's to add in an additional vent to the system. I'm considering using the SaniCompact 48 due to space constraints and according to the install guide does not need to be vented. I've read a toilet drain can flow past a sink drain if the sink has a minimum 50mm trap installed, is that not accurate based on your experience?
 

BrianM240

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The fitting up top is sealed off, I believe it's to add in an additional vent to the system. I'm considering using the SaniCompact 48 due to space constraints and according to the install guide does not need to be vented. I've read a toilet drain can flow past a sink drain if the sink has a minimum 50mm trap installed, is that not accurate based on your experience?

The SaniCompact also has the option to drain a sink into it, so I guess that's also an option for me if I rework the current setup.
 

Cacher_Chick

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MA is strict in regards to meeting the minimum requirements of the plumbing code, and it is for good reason. It would be in your best interest to familiarize yourself with it.
 
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