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We’ve been grappling with water leaking through the walls of our three-story victorian. Today our roof guy came out and discovered that, in addition to a few small holes in the roof, one of the pipes on the top of the roof was clogged.

He didn’t seem to know what those pipes are for–we have two, one on each side of the house, they are open on top–and all the houses around us have them. Anyway, he suggested capping the drain in case that’s where the leak is coming from. My worry is that those pipes are there for a reason–and that capping them will create problems for our drainage or sewer system.

We’ll call a plumber out for advice, but does anyone here know what the purpose of those roof pipes are? Or knowledge about what capping them might do?

Thanks so much for the help!