I have a sewer line that runs about 75 feet then I have a 45 degree bend to the rest of the line which is about another 75 feet. 2 questions: first, there is plenty of drop as it is downhill all the way, but can it drop too fast? If so what is the maximum drop I would want? Second, is the 45 degree bend OK? I didn't use a sweep, rather just a short 45.I can switch to a sweep since I haven't yet buried the line.

Thanks for the help!

Sporty you should have about 1/4 inch fall per foot too much fall will allow the liquids to outrun solids leaving some of them behind. As far as the short 45 I personally would have used the sweep the more gentle the turn the better off you are in my opinion. Perhaps our resident experts will come along and advise whether you can get away with the 45 or not. You might be all right but like I said the sweep would have been my choice. If I missed anything post back. GOOD LUCK, AC

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there is plenty of drop as it is downhill all the way, but can it drop too fast? If so what is the maximum drop I would want?

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AC gave you good advice. 1/4 inch to the foot is about the max that we give a sewer line. How we work this is to maintain 1/4 inch to the foot until we get out to the street raiser and then we 45 down to pick up the city raiser. Too little slope will not allow the movement to carry the solids while too much slope will allow the liquid to move so fast the solids are left behind.

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is the 45 degree bend OK? I didn't use a sweep, rather just a short 45.I can switch to a sweep since I haven't yet buried the line.

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This is kind of confusing. A 45 angles 45 degrees while a sweep angles 90 degrees. One isn't interchangeable with the other. If your asking two 45's are better then one short elbo. And a sweep is a long bend that does away with having to use two 45's.
Regards, Tom

So at the bend, in order to maintain only a 1/4 inch drop per foot, should I take a 45 or 90 and drop to the next section of pipe? The slope of the land probably won't let me keep it at only 1/4 inch per foot. But if I drop it a foot or so at the bend then continue on would that be OK?

OK Sport! If I understand you correctly you already have a line in from the street and are running a new line from the house. But at 1/4 slope to the foot the new line will end up a foot high at the bend. Right? 45 down from the new line and pick it up with another 45. But in addition t6o that I would install a two way cleanout and bring it to grade just before you make the 45 drop. Good luck, Tom

It is all one new line, but in order to keep it at 1/4 inch per foot, I may need to step it down. I just thought the bend would be a good place to do that. I couoldn't run a straight line all the way, so I had to put a 45 in. If I put a step in there to drop it down with either 2-90's or 2-45's I can make the turn and keep the slope right. Does that make sense and sound OK? I appreciate all you input!

Is there any reason that you can't make the 45 degree bend and maintain slope until you get through to the street, such as a hill where you're running out of ground? If that's the case then I would start at the raiser maintain slope until you reached the bend and start from the house end until the two crossed. Then use two 45's to angle down and line up. That way you would be maintaining proper slope all the way to the street. I would still install the two way cleanout at the 45 bend. Good luck, Tom

This pipe is running to an existing septic from a new bathroom in a separate building from the house. My problem is that to keep this pipe underground and maintain the proper slope is probably not possible. I was thinking that I might need to step it down to keep it underground and maintain the proper slope. I just seemed to me that where the turn is would be a good spot to do that, if that is a good option that is. My thought was to 45 down however far I need then 45 off that to the rest of the run down to the septic. My concern is that the flow through that step would be OK. I hope that makes better sense. Again, thanks for all your help!

Works for me Sport. Good luck, Tom