I think this must be basic plumbing but I can’t seem to find the answer. If you want to change the direction of a water supply pipe, where you want to drop vertically and also shift horizontally, can you slant the pipe or do you have to drop straight down then turn 90 and 90 again? In other words, do you use a 90 elbow to drop straight down, another 90 to turn (say left), then another 90 to turn again in the direction the pipe was going to begin with? Or can you use a 90 at the top but rotate it on some angle from the vertical (for example a 30 degree angle), so you drop drown and shift horizontally at the same time, then use another 90 at the bottom to turn again in the direction the pipe was going to begin with? (Sorry , I know there must be a better way to say what I mean – but I was up late? yea -excuse) Seems like if you slant the pipe you save a 90 degree turn and isn’t that better? (Or even required?) But on the other hand somehow I think no slanting would just look better (I know – illogical, might look better to me but not to a plumber). I did see one company’s photo gallery that showed a slanted pipe – but I can’t find any others. Any info would be much appreciated!

How do I replace a cast iron flange? It is welded on I think. I removed the screws and it of course didnt come off. I have a new PVC one, but not sure how to get this flange off. The bolts are corroded and old and just keep spinning, so I need to replace it.