The City Mouse in the Country

                             Up until this moment, I had never heard of or seen a Grinder Pump.  It's actually a very common piece of plumbing equipment that is usually found in commercial businesses or homes, like mine, that are located lower than the nearest municipal sewer line.  It's designed to prevent waste water backup.                 (Sorry for such a bad video but there is so little information out there)                  Now exactly how my house sits lower than the nearest municipal sewer line is beyond me.  After all, when my house was built, it appears to have been done so in such a way that all the water flows away from my home and downhill.   So what I'm thinking is that the grinder pump is there to "push" the waste into the sewer lines that are a good football field distance from my home?  My property is the last in the boro to be hooked into the municipal lines so I suppose I could be "down hill" from them?             I might be wron