I know code says you need a cleanout for every bend greater than 45 deg. If I use two 45's with a short length of pipe between them to make a 90deg. bend, do I still need the cleanout?
No, because it actually states, "greater than 90 degrees", with one exception where it can be 135 degrees. Otherwise we would be putting cleanouts all over the place if it were after 45 degrees.