wall mount toilet
The drain pipe is supposed to be sealed all the way to the septic tank so if rain water or ground water is getting in then you have a leak that needs to be fixed.
In turn, a high water table should not affect the waste water flow from the house to the septic tank.
Rain water, ground water, sump pump water, and gutter water are not supposed to be poured into the septic tank.
Normally wall mounted toilets are for style or for ease of cleaning underneath.
Check the instructions for the toilet for how long a near-horizontal run can be before the drain has to drop (vertically).
The disadvantages of crab apple trees. In summer, the apples are too sour to pick and eat. In winter the birds come and leave dropping all over the place.