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Yes a vent pipe can be painted AFTER it has passed inspections and some localities want the piping labeled "Vent"
A auto vent
Ask This Old House - 2002 Removing a Vinyl Floor Salvage Style Plumbing Vent Problems 9-25 was released on: USA: 26 March 2011
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
Yes, it does
Water Jetting works best
HECK NO, unless some installer was crazy enough to se a wet ventHECK NO, unless some installer was crazy enough to se a wet 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