Ensuring the sewer is done properly is undoubtedly a priority. Avoiding use of lift stations means even more care is needed to bring the 4 inch line low enough that even the furthest fixture can drain by gravity. In a rowhouse where the sewer enters the building via the side, it is quite possible that the available slope could mean you run out of space below the slab. That wouldn’t be good.
We seem to be on the right track with the sewer install thus far. We brought the main in deep enough that it is well under the footing. This maximizes the space to slope the drain into. We also trenched a path and left a gap in the middle footings to provide passage for the pipe. All this should combine to make it really easy for the plumber to get the groundwork installed.
This may not make sense to those unfamiliar with sewer installation, but everyone wants the toilet to flush. Getting it wrong is not an option. By avoiding unnecessary lift stations we benefit from free and zero maintenance gravity drainage.
this is where the sewer enters the building. We’ve got it prepped for basement plumbing.