Proper Drainage of Storm Water from Tile

Hi, I need to correct the way my storm water is draining from my home and I need some advise on how do it properly.

Current Situation:

Storm water collected in tile and sucked out with sump is going 100% into sewer connection. I am pretty sure this is an illegal connection as clean storm water is getting treated. The previous homeowner also had a bypass hooked up so you could shut it off to the sewer, and run it directly outside where he would hook up a hose to the connection and drain it into a rock bed. The problem with this connection is, it froze up and now leaks when I try to use it, so now I go 100% into the city sewer.

I would like to come up with a better solution, but I do not know what is typical when hooking up tiles for drainage. I have an abandoned septic tank, and I would like to run some waste lines from my sump in the basement, out to the septic and dump the ground water into it. The problem is how do I do this without keeping the pipes from freezing again when they go outside above ground before they go back underground. My sump runs in the winter about once a week so I need to be able to drain to the outside all year around. Is there some kind of check valve that gets used to keep water from being outside when not in use?

Any suggestions, help or plans you could provide me would be greatly appreciated.

Thanks!

Jeff T.
Michigan

Running out to your old septic tank would be pointless unless there is still a good drain field on the other side, and if that is so, you might as well just pump on out into that drain field that will probably still handle at least the small amount you need to put into it. Also, are you sure your old septic tank was not collapsed and filled in when your house was connected to city sewer?

Try to find the distribution box for your old drain field out past the septic tank, then dig a trench and run a 2" discharge line out to it. That D box is likely going to be very near the frost line, and the new discharge line you run out there will not freeze up as long as it is properly sloped and can drain itself into the field system.

As an alternative, I dug a 4'-square hole and lined it with concrete blocks in a circle and placed a lid on top, then ran my sloped storm-water drain into that.

I'm in Michigan as well. The way mine is hooked up is it runs underground (I assume 3' deep to keep from freezing) about 50' from my house. There is enough slope that it does not freeze where it exits. Personally I'd opt for a gravel/rock pit and just keep your discharge hose buried below the frost line.

My problem is my backyard gets very wet in the spring so I'm setting up a spring/summer discharge in my front yard and won't be burying the pipe very deep becasuse I won't have to worry about freezing.