So this is a plumbing vent instead of a furnace or hot water exhaust vent? Ive used Fernco rubber caps on unused vents, with the screw down pipe clamps around the bottom. Also these are just to allow air into the vent so draining water doesnt create a vacuum so I suspect there is little to be concerned about with cutting them off just above the roof flashing and allowing enough room over the top to allow air to flow into it. On a three inch vent that is only ¾ to equal the surface area of the pipe. The top of the flashing is protected by the module over its top. Over time would there be sewer gases which might cause trouble on the back sheet of the module? I dont know.
Bill Dorsett Manhattan, KS From: [email protected] [mailto:[email protected]] On Behalf Of Drake Sent: Thursday, October 03, 2013 8:03 AM To: RE-wrenches Subject: [RE-wrenches] Sealing roof vent Hello Wrenches, We are moving a roof vent. My plumber suggested that we cut the old one and cap it instead of having to repair the roof. I'm not sure a capped vent would be short enough to fit under the array. What if we were to cut the vent off at the flashing level and plug the pipe. A rubber plug could be put in and topped with hydraulic water-stop cement. Neoprene roof sealant could be spread on top of that. Has anyone tried anything like that? Are there any other good options? Can you see any issues with this method? Thanks, Drake Drake Chamberlin Athens Electric LLC OH License 44810 CO License 3773 NABCEP Certified Solar PV 740-448-7328 http://athens-electric.com/
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