Basement floor drain install?

[Muni]

I bought a house 3 months ago that has a "bonus space" under the house. It's currently a 11 x 13 room that was dug out next to the utility area and sheet rocked over new block retaining walls. I plan to install a basement window and enlarge the room but the current floating wood floor will not support the weight of tanks. I'd also like to drop the floor level a few inches as I am rather tall.



I'd like to remove the half-assed floor and poor a concrete floor of which I have experience doing. What I haven't done before is the in floor drain. The floor of the basement is lower then the main septic line hookup to the city. Can I do a dry sump style drain box? Dig down about 3 feet around and 3-5 feet deep put in a perforated catch tank and surround it by large rock to drain any water that might hit the floor down there? I live on above the water table in a dry region so I'm not concerned about ground water coming UP into the basement.


I'll be consulting with some local experts/family but was wondering if any of you guys had experience with this.

 

[Dan F]

You can buy a sump that has inlet ports and an outlet through the lid/access-cover that is designed to be poured in. You would run a perimeter drain and your floor drain into the sump and then the outlet is plumbed up to your drain plumbing.

I have also seen DIY sumps made from buckets or small barrels which actually work just as well if you aren't getting permits and/or inspections.

 

[Muni]

The basement room was done without permit and doesn't have an egress window so it's just "Storage" officially. All that was done prior to me buying the house.

My family is masons and construction so I'll be calling in a few favors to do this stuff above code so it'll be safe. I think a dry well will be sufficient. Just looking for any other ideas I may have overlooked.