If it is capped tight, it is no longer in use and that keeps rain and birds out of the pipe. If it has a cap that is above the pipe like an umbrella, it is for the same reason and to let fumes or exhaust out.
A pipe extended above the roof level is a soil pipe.
Rain has the potential to splash about 8 inches vertically. Check with the local fire code for the required height above a roof for a stove pipe. Typically fire codes will require the opening of the stove pipe to be at least 2 feet above the highest adjoining roof area.
To properly install a toilet roof vent in your home, follow these steps: Determine the location on the roof where the vent will be installed. Cut a hole in the roof for the vent pipe to pass through. Install the vent pipe through the hole, ensuring it is securely attached. Connect the vent pipe to the toilet drain pipe using appropriate fittings. Seal around the vent pipe and roof opening to prevent leaks. Test the vent to ensure proper ventilation.
Lead flashing.
TERRA COTTA ROOF
shack
It has a retractable roof.
The sewer vent pipe is typically located on the roof of the building.
If your policy has coverage for accidental water discharge, the resulting damage would be covered but only after the owner has repaired the damaged pipe. If your pipe busted as the result of a covered peril such as fire, wind hail etc (see your schedule of covered perils) then the pipe itself would also be covered.
To properly vent a bathroom fan through the roof, you will need to install a vent pipe that runs from the fan to the roof. Make sure the vent pipe is properly insulated and sealed to prevent air leaks. Cut a hole in the roof for the vent pipe and install a roof vent cap to prevent water from entering. It is recommended to consult a professional for proper installation to ensure safety and effectiveness.
like a boss
Generally there is no need for a roof jack in a porch roof. If the porch ceiling will be covered you could run a vent through the roof.