Background: I have a 1955 raised ranch with a full bath and a kitchen on the main floor= , both have sewer lines that go straight down into the basement floor. The = basement is unfinished but I have plans to frame and start the finishing pr= ocess during the summer of 2013. This includes adding an additional full ba= th.
The Issue: Once a year or less the floor drain in my basement has sewage come up from = it and spills across the basement floor. Most incidents are minor and may g= et 20% of the basement floor wet, but once the entire basement had 2-3" of = sewage and it came from the floor drain and the cleanout in the main stack = from the upstairs bathroom. (cleanout is only 2" above the floor)
Possible Solutions: A: Permaseal quoted me the highest at $7000 for a solution that would utili= ze the same gravity feed system but with a pit to allow for use during back= flow issues. This involves a double backflow valve, T splitter to allow sew= age from house to spill into a pit when the valves shut, and an ejector pum= p to force the sewage out in front of the valves when sewers are backe= d up.
B: Plumber 1 quoted me at $5k for a whole-house ejector pump solution. The = main line from house would dump into the pit, an ejector pump would pump th= e sewage 6ft vertically and then back down into the main line out of the ho= use. This creates a mock overhead system to prevent backflow from the city.
C: Plumber 2 quoted me at $5k for a "basement only" ejector pump solution. = The floor drain would sealed shut, main stack from second floor bathroom re= placed with PVC so that the cleanout is 2ft higher, and install an ejector = pump for the laundry tub and future bathroom.
D: Are there others??