"They charge around €120 for a pump out. Tank is 4 cu mtr."
ours is 3 cubes x 2. About the same price here then, been here 17 years, emptied once when we bought the place, then again 3 years ago again. seems if it's working "right", then it'll take care of itself up to a point, and doesn't need emptying that often. A lot of them don't work properly because folks put too much rain water though them, keep them seperate, so it only has to deal with the jobby... don't dilute them un necessarily...
you never empty it completely, always leave enough to keep it going, as for not spraying it on fields anymore, that's maybe the official version....
ours is 3 cubes x 2. About the same price here then, been here 17 years, emptied once when we bought the place, then again 3 years ago again. seems if it's working "right", then it'll take care of itself up to a point, and doesn't need emptying that often. A lot of them don't work properly because folks put too much rain water though them, keep them seperate, so it only has to deal with the jobby... don't dilute them un necessarily...
you never empty it completely, always leave enough to keep it going, as for not spraying it on fields anymore, that's maybe the official version....