kahuna06

I live in Chicago and have a condo in a 6-unit complex. We just had our main lines and side gangway all rodded out about a month ago but we had sewer back up come up in our boiler and laundry room drains. Anyone have any idea why it would be backing up? Do we have to put a backflow preventer down by our catch basin to prevent this from happening again? Where does that water go then, stay out by the city sewers?
Besides for our drains backflowing our whole building has problems with the back area flooding. Our roof tilts towards our backyard. There are 2 downspouts which flow away from the building. I guess we had the downspouts directly into the catch basin but that always overflowed our laundry and boiler rooms. Heavy rains still flood our basements; through walls, through drains. We have no idea where to put this water until it has time to drain slowly through the catch basin out to the city sewers. Any suggestions at all would be appreciated.

Ron

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