I have had a house built in 1997 and the sump pump has been removing water 24/7...365 days a year. Even in a drout....we have water coming into the pit. I am now on the fourth sump pump. After the last Chicago area blizzard on Feb 2nd and subseqent melt a torrent of water has been coming in and the back up (Basement watchdog has kicked in). But this time, it is more than ever. The main pump is submerged and is constantly pumping now for nearly two weeks straight and the only relief is when i manually lift the float on the watchdog to assist in pumping. It's a matter of time only when it is submerged again. I checked with the neighbor across the street and they said they hardly ever get water.(?) The neighbor on my one side says his goes off randomly, which I can hear. Two of the houses on my side of the stree within the last month have had "basement dry" type companies at their homes to do work. Could they have done something that is diverting water my way? I tested the water for chlorine thinking possibly it was a leak from a city source and it is clear. The main pump is eliminating water and the check valve is not bad. Any ideas? It will only be a matter of time before this new pump quits.