# What's this for??? **URL:** \ **Category:** Plumbing Inspections\ **Created:** [August 9, 2006, 4:12am UTC](https://forum.nachi.org/t/whats-this-for/6422 "2006-08-09T04:12:02Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![mmorgan](https://avatars.discourse-cdn.com/v4/letter/m/a87d85/32.png) [@mmorgan](https://forum.nachi.org/u/mmorgan)\ **Post date:** [August 9, 2006, 4:12am UTC](https://forum.nachi.org/t/whats-this-for/6422/1 "2006-08-09T04:12:02Z")
Any ideas what this is for? It is under the home on the commode drain line. Maybe the plumbers had some leftovers they wanted to get rid of?? ![SV400132.JPG](https://global.discourse-cdn.com/internachi/original/3X/3/0/30d577effe5f32efd9587ec9c27d9c2a316d42cf.jpeg) ---
**Author:** ![jpope](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/jpope/32/59425_2.png) [@jpope](https://forum.nachi.org/u/jpope)\ **Post date:** [August 9, 2006, 4:46am UTC](https://forum.nachi.org/t/whats-this-for/6422/2 "2006-08-09T04:46:05Z")
Looks like a sorry attempt at an island (or high loop) vent. And the AAV is serving what? This system is fubar and needs some correctin’. ---
**Author:** ![ppendley](https://avatars.discourse-cdn.com/v4/letter/p/7ea924/32.png) [@ppendley](https://forum.nachi.org/u/ppendley)\ **Post date:** [August 10, 2006, 3:19pm UTC](https://forum.nachi.org/t/whats-this-for/6422/3 "2006-08-10T15:19:34Z")
Mike, It looks as though that pipe is in the crawl space…Did you map it out? Im curious to know what it is connected too. Paul Pendley Premier Property Inspections ---
**Author:** ![jeffghooper](https://avatars.discourse-cdn.com/v4/letter/j/a9adbd/32.png) [@jeffghooper](https://forum.nachi.org/u/jeffghooper)\ **Post date:** [August 10, 2006, 9:24pm UTC](https://forum.nachi.org/t/whats-this-for/6422/4 "2006-08-10T21:24:32Z")
How far away is the nearest vent, VTR? We used to do that when we were pressure testing, and then would later connect the vents.