Wet basements typically mean wet walls. Pressure from outside the house is greater than the pressure inside, and water can weep down the walls. If there’s no way for it to get into the drain system, that’s a problem. The dimpled membrane creates a pathway for the water to pass.
Concrete. Bags of concrete are laborious. However, I did this job in sections that made hauling and mixing bags a little easier—and, again, way less expensive—than managing a concrete truck, chutes and yards of concrete flying into my basement. So if you mix, you need space for a wheelbarrow and buckets for water. Pit. You can buy plastic barrel sump pits and drop them in your hole, then run the pipes to them. That would be faster and easier than what I did. But, they can cost a couple hundred bucks. Mine cost maybe twenty. It took a little while, but I built some forms out of some scrap lumber and poured concrete walls for the pit. You could argue it was a waste of time.
The best way to win the war with water is to let it out. The dimpled membrane (left of photo on the floor) lines the wall. Gravel and concrete then cover the pipe.
I built plywood forms and poured concrete walls for the sump pit.