Bathroom Sink Drain Vent
Learn everything about AAV plumbing, including how to install an air admittance valve under sink basins to save time and money. Without proper drainage and venting in your bathroom sink, you may experience slow draining, unpleasant odors, and even health hazards. This guide will walk you through the process of draining and venting a bathroom sink to get the best performance out of your sink.
This Old House plumbing and heating expert Richard Trethewey demonstrates how to address common sink drainage issues and install. A sink vent is a necessary part of the drain for any sink. Installing an AAV when a traditional vent is not practical can help improve sink drainage.
The drain in the toilet bowl is basically a P-trap, and we've already explained what happens to P-traps when a vent gets blocked. You may notice related drain problems that could indicate a blocked vent, like slow draining from a bathtub or sink, or rotten, sulfurous smells emanating from a drain. Learn how to add plumbing vents during a home remodeling project to safely vent kitchen and bathroom drains.
Ask This Old House plumbing and heating expert Richard Trethewey helps add ventilation to a bathroom sink that is unvented. Learn how to vent a toilet, sink, and shower so you can add that new bathroom to your basement. Let us help you properly plumb your home.
Read how to properly vent your toilet, sink, and shower and learn the importance of effective plumbing ventilation to ensure a well. The drain line from the bathroom sink can sometimes function as the vent for a downstream fixture like a toilet or shower. This dual-purpose pipe must be adequately sized to ensure that water flow does not completely fill the pipe's diameter, allowing air to pass over the draining water to maintain the protective trap seals of the other fixtures.
A special venting method using the horizontal wet venting of one or more sinks, floor drains, lavatories or drinking fountains by means of a common waste and vent pipe.
