Radio Shack "drain pipe tracer".
If you are talking about a roof water drain pipe to sewer it is illegal. If you are talking about a sink drain pipe well that is where they all connect to so yea.
You can do this with something like a storm water pipe. Storm water is basically clean and there is unlikely to be any problem with build up of sludge in the pipe. You should not do it with sewerage pipe as it will cause it to block up eventually
2"
You put a drain auger down the pipe from the nearest cleanout. You will feel the blockage when you get to it, - then break it through and clear it with the auger.
With a level
1/8 " - 11/2".
One quarter inch per foot is standard "slope". This equates to a quarter bubble on a level. If you don't have at least one eighth of an inch "slope", your drain will not work properly and will clog constantly.
The gradient of a drain is the slope or incline of the drain pipe. It represents the change in elevation of the drain pipe over a certain distance. A steeper gradient indicates a faster flow of water through the drain.
Only if the people want the contents to flow back or forward.
1 in 150 for each pipe is better
One-quarter inch per foot is both the standard practice all around the country and the minimum slope (or grade) allowed by most codes. If maintaining that much slope is a problem, an exception can be requested from the administrative authority.
Radio Shack "drain pipe tracer".
See if there is something stuck in the pipes that is clogging it up and causing this to happen.
No. If you think about it, upstairs toilets actually drain through the walls and down under the foundation and footings, so you would have a 100% slope there. You can have too little slope, but never too much, since gravity is actually what drains a toilet. Yes you can. Pipes that run vertical are not a problem because friction is not acting on either the solid or the liquid matter. Where a pipe is sloping steeply the water can run away leaving solid matter behind.
$8,300
Yes, a sewage drain pipe can be too large.