![Why does my bathroom sink drain super slowly - is it because there is no overflow to allow air in? It has been like this since install so we know it is Why does my bathroom sink drain super slowly - is it because there is no overflow to allow air in? It has been like this since install so we know it is](https://preview.redd.it/fc49xdcvrn881.jpg?width=640&crop=smart&auto=webp&s=5d0a5ca07c402a6bf363259d25f20f6c6dbac612)
Why does my bathroom sink drain super slowly - is it because there is no overflow to allow air in? It has been like this since install so we know it is
![bathroom - Bath and sink connected on same pipe - bath gurgling when sink emptied - Home Improvement Stack Exchange bathroom - Bath and sink connected on same pipe - bath gurgling when sink emptied - Home Improvement Stack Exchange](https://i.stack.imgur.com/OlWhD.png)
bathroom - Bath and sink connected on same pipe - bath gurgling when sink emptied - Home Improvement Stack Exchange
![Why does my bathroom sink drain super slowly - is it because there is no overflow to allow air in? It has been like this since install so we know it is Why does my bathroom sink drain super slowly - is it because there is no overflow to allow air in? It has been like this since install so we know it is](https://preview.redd.it/o9b2imcvrn881.jpg?width=640&crop=smart&auto=webp&s=83a0da2d73bf1dd19594f6e4dbe1fc418a1f4807)
Why does my bathroom sink drain super slowly - is it because there is no overflow to allow air in? It has been like this since install so we know it is
![plumbing - When does an under the sink P-Trap assembly need venting? - Home Improvement Stack Exchange plumbing - When does an under the sink P-Trap assembly need venting? - Home Improvement Stack Exchange](https://farm9.staticflickr.com/8468/8150583617_7746e98ba6_n.jpg)