That would depend on the piping material, If I was using a DWV copper system I would use a silver bearing alloy or braze the joint, If I was using a cast iron bell and spigot I would use oakum and caulked joint, If it no hub cast Iron then a mission coupling or mechanical joint would be appropriate , if it is a Duram system then pipe joint compound is the way to go or Teflon tape or paste
PVC needs to be taken apart and use primer and glue
Water Jetting works best
A auto vent
Yes BUT not an outside wall
yes,
Vent through roof
You should not have to clean a vent on the roof. unless you are trying to clean the waste line to the fixture below. Then you would send plumbing rods through the vent on the roof.
In plumbing the roof vent should be a min of 4" to prevent hoarfrost
A roof vent can be blocked by hoar frost and to illimate this phonimia you need to increase the vent terminal to 4" If a vent terminal is blocked by leaves or other soft debris the water jetting is one of the best ways to clear it
Yes, it does
Yes a vent pipe can be painted AFTER it has passed inspections and some localities want the piping labeled "Vent"
Depends on the size of the vent and what city you're performing the work in. Speak with a plumbing inspector for that city and tell him the size vent and he will tell you the maximum length. To determine the size of a vent you have to know developed length of pipe and fittings and the fixture units connected
One that vents one fixture