My kitchen drain has been damn near worthless for the last 10 years. It recently now won't drain for chit. I had a plumber come over to clean the drain pipe. It came back all mud within 10 ft.I've had foundation issues that required jacks. I used olshan. The plumber said it was probably my drain pipe washing out all the dirt under my house leading to foundation drop? He recommended capping pipe and stack on that end of my house and installing a Saniflo. Another option would be get another contractor with camera and see what the damage is. I was looking at Sanivite. http://www.saniflo.com/homeowners/sfa-product-line/pumps-for-kitchen-and-laundry-room/ All feedback welcome. I'm just unsure how much the Saniflo will hurt home value.