plumbingpump
I am installing a sewage ejector pit and pump in basement, hole is dug and I piped the inlet pvc for the toilet and sink. I did not have time to backfill or concrete.
The next morning I woke up to find after a night of rain the basin floating in groundwater. The septic tank is right next to my sump pump.
If I backfill and concrete the sewage basin and pump in, will the excessive ground water be a problem later?
I'd start by snaking the shower drain. Liquid drain cleaners help with grease and oil buildup in the trap, but less so on hair or other solids, especially if they are further down the line (e.g. near the vent). The shower drain will be a lot easier to snake since you don't have to worry about damaging the toilet's porcelain finish.
OK... so the mystery has been solved. :-)
The problem got so bad today that the failure rate reached 100% (every time the pump came on it would churn for >30 seconds)... I got a lot of text messages. When I got to the pump, I noticed that during these failures there didn't seem to be any flow at all, and I could feel the pressure build up around the coupler just below the flow control check valve (the one above the ejector pump).
I began to suspect the issue was with this valve, so I took it off and found it was basically just a disk inside a cylinder. It was not attached to anything (no hinge to keep it from flipping over freely). This effectively made the valve stop flow in either direction. I guess that the valve was originally something like this:
The issue may be similar to the issue described in this video, except my valve (American Granby SPCV200) was a swing check valve:
Best Answer
We can presume that the basin is watertight (both out and in). The only real concern, then, is whether the boyancy of the air in the empty tank will overpower the weight of your concrete (or the mechanical connection between the concrete and the basin).
If those aren't a concern, all should be fine. I imagine that the basin has edges and depressions that will anchor it well in the concrete.