OK, so just to give some back ground I have an alternative septic system (i.e. the sewage goes into a main tank and is then pumped up to the septic field). the septic field is easily 15 feet higher than the tank. There has not been an issue at all for years but noticed the last few years during long periods of rainfall, like heavy rains for a few days in a row, the septic tank fills up. I understand that the perforated pipes in the field will let water in from a saturated septic field and that the issue. My problem is I can not figure out how to go about remedying the issue. I have pulled all non essential things form draining into the tank and plan to install dry wells for the house gutters, as soon as I figure out the a good distance from dry well to septic field. We also use the water lightly when we have rain fall. Is there any good fix or anything I can try that might help? Is there such a thing as shutters you can install in the pipe that only allow water to flow one way? Thanks for any advice.

I was reading in one of the other threads that if you have two pressure tanks in one system at the same cut in pressure, it acts like one tank. I now have a 40 gal bladder tank in my well pit, with a 3/4hp red jacket pump. 30/50 pressure switch. I checked the pressure in the tank and it was good. my question is the well kicks on after 5 gallon pull down. I was wondering If I put an additional tank in my basement, how big would it have to be to draw 20 gallons of water before the pump kicks in? is there a table that would show that? 20 isn't a fixed number, but it just seems like the pump kicks in a lot.