AsktheBuilder.com: Vent pipes are needed to supply air to water pipes. . PVC pipe at the bottom of the photo held up by the j-hook is a drain pipe for a shower. pipes but did not allow for enough distance for the fixtures to go on after tile was . Drain and vent lines are important aspects of your home's sewer system. We'll show you why they matter and how to install them yourself. Codes dictate the proximity of vents to drains, and the rules should never be ignored. If the vent is too far away, it won't be able to break the vacuum and allow . Dec 6, 2018 - No bathroom plumbing system is complete without ventilation. When you flush the commode or drain the tub, wastewater pushes the existing . Aug 15, 2017 - Seems like overkill to have two 2' vent pipes for the same bathroom . I will either cut it out and cap it so I can just tile over the capped pipe. Dec 19, 2016 - I've installed an exhaust fan in an upstairs bathroom and need to vent it . The standard 4' pipe jacks and flashings I'm finding at Home Depot . Mar 29, 2011 - A 2″ vent is large enough for a bathroom group. . gets put down the drain such as tile grout or drywall mud and hardens in the trap. Maybe . . a bathroom remodel, I often have conversations about tile and fixture layout, style and finish. . The stain is the result of a fan pipe that was installed through an unheated . Small sheet metal screws are acceptable with bath vent pipe, but the .