Talk:Plumbing drainage venting
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[edit] Rewriting
The original article seemed a little difficult to read. I tore it apart and rewrote it to be a little shorter and clearer.
It also seemed to be a sales pitch for air admittance valves, which I'd never heard of before. I suspect most people are more familiar with the stack-on-the-roof sewer vent, so I wrote the article more around those, and left the AAV link if people want more information.
Finally, a picture of a residential building with a sewer vent would be very useful, as would a diagram of a vent, two traps, and sewer line. --Mdwyer 19:48, 2 October 2005 (UTC)
- Agreed. If I had artistic skill, I'd do the drawing. There's a Home Depot book with some wonderful graphics, I'll see if they'd be willing to let it be used (for credit: "Wikipedia's use of this image has been graciously donated by Home Depot" or similar). (Bob Nardelli owes me a favor, so what the hell.) --Yiddophile 03:12, 24 November 2006 (UTC)
Someone has rewritten my rewrite. I think it is good enough to remove the banner from the top, so I am going to do just that. I'm also going to integrate the HepvO product into the article a little more so it doesn't look so tacked-on.--Mdwyer 19:44, 28 November 2005 (UTC)
[edit] Merging and Cleanup
I have removed the suggestion of a merge to Domestic water system, because this topic is more generally applicable than to just that system. I have merged in the content of Air-admittance valve. I have also begun the process of wikifying this article. -- kaosfere 18:25, 27 July 2006 (UTC)
[edit] Air admittance valve?
The "Venting to atmosphere" section is great! Of course, diagrams and picutres would make it even better... But the "Air admittance valve" section does not make sense -- if it only allows gases in, not out, how does it prevent back-pressure when a toilet flushes?69.87.193.156 13:05, 6 September 2006 (UTC)
- It doesn't. This, and its requirement for maintenance, are a couple of the reasons they're not liked by some (ahem... a lot of) building codes. In general, though, positive pressure isn't as big a deal as negative pressure - positive pressure means small amounts of sewer gas entry (bubbles in the toilet bowl) or just that the water in the P-traps rises momentarily. Negative pressure siphons out P-traps, resulting in a wide open source of yummy sewer gases. So yeah, you flush the toilet and the pipe goes through positive pressure as you displace your goodies (AAV not doing anything to help you) and negative pressure as that column of water falls down the pipe (AAV opens and prevents siphoning of P-traps). Since they do 50% of the job *and* require maintenance (replacement every 5 years or so), they rank alongside MJ clamps as the last refuges of the damned. Yiddophile 03:08, 24 November 2006 (UTC)
[edit] Cleanup of plumbing articles
FYI -- I'm cleaning up/organizing the plumbing articles. 129.237.114.171 18:43, 27 November 2006 (UTC)
