Sump pump pit pipes?

I have a walk up basement with a sump pump pit in one room of the basement. I have three black 4" diameter pipes going to this pit and can't figure out what two of the three pipes are for. The one pipe drains water to the pit from the walk up basement stairs. The other two I cannot figure out where they coming from. Are the two pipes foundation drain pipes? No water is draining from the two pipes at all, EVER. Unlike the walk up drain pipe which makes the sump pump run every other minute when it rains hard. I fear that my basement is sitting in water and hydrostatic pressure is building up.

Probably is from the drain tile. If your surface drainage is good you ideally won't get any water coming into the sump. What makes you think there is a problem?

Thanks cacher

Thanks for the reply cacher. I have a 1/3 acre lot, about ten feet is flat running away from the back then the rest is a hill that slopes towards to the house, aprox 12 feet high. My real concern is two cracks on the the side of the walk up stairs. When it rains, water comes up from these cracks, almost looks like it is boiling up. They are the sixth and seventh (11 steps total) step from the bottom of the walk up basement leading to the backyard. After it is done raining, a sediment trail can be seen from both cracks to the bottom of the walk up going to the drain pipe. The cracks on the steps are 2.5-3.5 feet below the surface, bottom of the walk up is 7.5 below the surface. I attached a photo to help you visualize. Could these cracks be draining the water around my foundation, that's why those pipe in the sump pit don't do anything?

Cacher I replied to your message, couldn't post pic on to a quick reply, so I had to post a regular reply to my original. Confused, yeah, me too.

Those two pipes are almost certainly from around the foundation and if your house is like mine (which it isn't because mine is much older) you will not see water coming from those pipes unless it rains very hard for a long time. Like cacher said, you probably have good drainage around the house e.g. clear gutters so water rarely gets that far.

I have only seen water come from my pipes like those twice in about two years. Most recently with the 4+ inches of rain we had in DC in the space of 24 hours.

If pressure is building up, you will have wet spots on the floor in your basement. I get this if my gutter gets blocked in an area not covered by the foundation drains (only two of four walls are covered by my sump).

I have a drain like yours at the bottom of my basement stairs but it is plumbed to the city sewer. This is illegal now (yours is done right) but because the setup is old it has been grandfathered.