# Water trap? **URL:** \ **Category:** Inspecting HVAC Systems\ **Created:** [July 19, 2011, 3:10am UTC](https://forum.nachi.org/t/water-trap/61021 "2011-07-19T03:10:24Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![dyoung](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/dyoung/32/2270_2.png) [@dyoung](https://forum.nachi.org/u/dyoung)\ **Post date:** [July 19, 2011, 3:10am UTC](https://forum.nachi.org/t/water-trap/61021/1 "2011-07-19T03:10:24Z")
Condensation drain line was attached to sewer drain pipe. Call it out because of gases seeping back into unit. The remodling contractor stated " a water trap is installed to prevent sewer gas from flowing back into unit" My question- Does this look like any type of water trap that would prevent gases from seeping back into unit? Also drain line was leaking from unit itself. ![2011_0627410BStreet0224.jpg](https://global.discourse-cdn.com/internachi/original/3X/9/0/90e2d4176f79cad3a5f861691bc7acc169faccfe.jpeg) ![2011_0627410BStreet0223.jpg](https://global.discourse-cdn.com/internachi/original/3X/f/0/f01e8d8192bb2a5a50186575a4163afb8936f821.jpeg) ---
**Author:** ![dandersen](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/dandersen/32/59398_2.png) [@dandersen](https://forum.nachi.org/u/dandersen)\ **Post date:** [July 19, 2011, 3:16am UTC](https://forum.nachi.org/t/water-trap/61021/2 "2011-07-19T03:16:20Z")
You are just so pickey! :shock: ---
**Author:** ![dyoung](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/dyoung/32/2270_2.png) [@dyoung](https://forum.nachi.org/u/dyoung)\ **Post date:** [July 19, 2011, 3:34am UTC](https://forum.nachi.org/t/water-trap/61021/3 "2011-07-19T03:34:37Z")
Seriously ---
**Author:** ![belliott](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/belliott/32/57038_2.png) [@belliott](https://forum.nachi.org/u/belliott)\ **Post date:** [July 19, 2011, 4:13am UTC](https://forum.nachi.org/t/water-trap/61021/4 "2011-07-19T04:13:01Z")
Seriously I am asking if we are seeing the whole thing or does the water flow uphill? Need air gap and trap. Picture is blurry but what is that grey snake going to. ---
**Author:** ![dyoung](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/dyoung/32/2270_2.png) [@dyoung](https://forum.nachi.org/u/dyoung)\ **Post date:** [July 19, 2011, 4:19am UTC](https://forum.nachi.org/t/water-trap/61021/5 "2011-07-19T04:19:17Z")
Dont remember about grey snake but now i looked at it closer, looks like conduit; suppose to go back on re-inspection; the water flow is slightly downhill from unit to sewer line ---
**Author:** ![clambert2](https://avatars.discourse-cdn.com/v4/letter/c/f08c70/32.png) [@clambert2](https://forum.nachi.org/u/clambert2)\ **Post date:** [July 19, 2011, 4:30am UTC](https://forum.nachi.org/t/water-trap/61021/6 "2011-07-19T04:30:24Z")
Not allowed to drill and tap into sewer lines like that. Improper ---
**Author:** ![jmoore5](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/jmoore5/32/57038_2.png) [@jmoore5](https://forum.nachi.org/u/jmoore5)\ **Post date:** [July 19, 2011, 5:47am UTC](https://forum.nachi.org/t/water-trap/61021/7 "2011-07-19T05:47:57Z")
What is shown in pic 1 is not a trap but just an uphill section. ---
**Author:** ![bgraham](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/bgraham/32/179260_2.png) [@bgraham](https://forum.nachi.org/u/bgraham)\ **Post date:** [July 19, 2011, 8:48am UTC](https://forum.nachi.org/t/water-trap/61021/8 "2011-07-19T08:48:39Z")
It would have been a lot easier to install a condensate pump and been done:D ---
**Author:** ![roconnor](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/roconnor/32/1762_2.png) [@roconnor](https://forum.nachi.org/u/roconnor)\ **Post date:** [July 19, 2011, 12:57pm UTC](https://forum.nachi.org/t/water-trap/61021/9 "2011-07-19T12:57:32Z")
Its not acceptable to connect a condensate drain to a main waste line … even with a trap in the condensate line. What happens in the fall/winter when the cooling system is not running and the condensate trap water dries out … :shock: . ![1242.jpg](https://global.discourse-cdn.com/internachi/original/3X/b/8/b8431c719b32e0f719c9bf41936d4f5d7c4d0d86.jpeg) ---
**Author:** ![dyoung](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/dyoung/32/2270_2.png) [@dyoung](https://forum.nachi.org/u/dyoung)\ **Post date:** [July 19, 2011, 12:58pm UTC](https://forum.nachi.org/t/water-trap/61021/10 "2011-07-19T12:58:44Z")
Exactly, thanks