The plumbing vent pipes can be routed sideways through the interior framing and can sometimes be joined together before they exit our dome. Where the vent pipe is to exit through the dome shell, all you need do is make a hole through the panel in the appropriate location, extend the pipe through, concrete back up against the pipe, caulk and paint. The plumbing vent pipes are sealed to our concrete dome with caulk, e.g. urethane or butyl rubber. A plumbing boot like the type used on shingled houses is not used.
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