Hello, I look for a Illinois opinion for a small sewer Job design.
I have sufficient inclination to drain the basement into the public sewer, but every couple of years a small overflow, 1...2in above deepest point basement floor.
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In Germany and Canada I would split the drain for upstairs and downstairs according to the pictures below.
(This depends on the occupation ...., but for a private home with no mandatory bathrooms in the basement like shown below, without pump).
In the particular case there is the issue, that there is no overhead space to offset the vertical stack as shown. So this needs to be done under the floor. But every Sewer line is tested with 10ft head, so the pressure should not be an issue for a new pipe (reality 2ft head for 30minutes...).
This is from Winnipeg, same systematic:
The 2 alternatives I get is:
- place the whole house (all) behind a back-flow valve, with pump (10k) or without pump (3k)
- build an overhead sewer around the house and pump all from the basement up
I'm still convinced the opinion as sketched above is an appropriate solution:
- The house width is only 24ft. So we have 30ft trench under concrete in an unfinished basement
- would have no interference with the nice lanscaping
- All Lines under the floor would be new and optional we could even pull in a new one from the basement to the street sewer
- All old, dead connections from the already disconnected gutters would be taken care off, removed.
- No Pumps (Energy consumption, depreciation, less to inspect (only the valve))
- optional we could start to build a drain-tile system in the open trench (evenso there is no groundwater currently).
- but, agreed, slight higher risk, because a failed valve has a higher failure consequence than a failed ejector pump
I don't find anything in the Illinois or International Plumbing Code what would argue against the sketch.
Whoever has some experience. I like to hear.
Thank you!
Tino Bretschneider
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Tino Bretschneider Ph.D., P.E., S.E., M.ASCE
Senior Engineer
Elmwood Park IL
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