Sump pump horizontal distance - Why do 90 deg angles put more load on the pump after a vertical drop?
As  Jimmy Fix-it says, it's a question of whether the pump sees those elbows, and the associated pipe friction, or &quot;dynamic head,&quot; or not.
If you have (say) a 2&quot; discharge from the pump, but you put 3 or 4&quot; pipe in the ground, then it's likely that the pump will never &quot;see&quot; the rest of the pipe, if it's properly sloped and does not freeze or clog.
If it's 2 inch pipe all the way, then it will fill up when the pump is running, and the pump will be pumping against that pipe friction. Whether or not that's a problem would depend on the pump specifications. Gravity flow with low head is quite slow compared to typical pumping rates.