We moved into a newer home in MI last August and the sump pump did not run at all. We probably went through our worst rain event in a very long time (receiving 5 inches of rain in about 3 hrs) and still, the pump did not need to run. It wasn't until December when the snow started falling that the sump pump started running. By January it was running about every 15 - 20 mins, and by the end of February through currently it is running every 3 mins. The previous home owners built the house in 2005, so it is about 9 years old. I called a plumber to see if they could replace the sump pump (for piece of mind) and also check the city water back up sump pump (for additional piece of mind). I was amazed to find out that the previous owners had re-routed the sump pump to drain into the sewer line (illegal). The plumber couldn't put in a new sump pump but quoted me on re-routing to the exterior of the house. My property is on solid clay with very poor drainage. I am questioning where to direct the discharge pipe after it exits my house. I do have a low swail area towards the back of my property, but it is probably 150 - 200 ft away. Is that my best option? I have a wood lot on the side of my house with the discharge pipe, but i do not know how well it would support that qty of water being pumped to it. I am also concerned about the discharge pipe freezing up in the winter. I would like to run it underground, but do not have enough slope to run below the freeze line of about 3 - 4 ft. Should I try to run it with rigid 4" pvc through my back yard and into the swail area?