We have this problem. A drain system was put in 6 months before we bought the house. I think its the wrong type. Got the clean outs put in, a back up sump and battery back up. Even had to put in the buried discharge pipe. Being a first time home buyer really snagged us. Supposedly the owner wasn't aware of the problem. We dump an insane amount of water every day from our sump pump. My main problem at the moment is the buried discharge we put in seems to be clogging as well. Any advise??