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Nesgroup address: alt.building.construction - Date & Time for the message: Thu, 21 Jul 2005 17:18:19 -0500
/ Author of the message: HerHusband |
Title of the message: |
Re: Plumbing vent question
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Text of the message: |
Harry, > Why do they use them only on sinks now, when previously, > through-the-roof, oldfashon vents were used? In other words: if they > can take the sink and dishwasher off the through-the-roof vent, why > cannot they take everything off the through-the-roof vent? My guess... Vents serve two purposes, letting fresh air in, and exhausting sewer gasses out. The air admittance valves only solve the problem of air coming "IN" to the system. Without a supply of air to replace what the draining water takes away, the drain will go glug, glug, glug, and can potentially syphon water out of the traps. It's like pouring liquid from a can that has only one hole. Punch a second hole so air can get in, and it flows much better. However, the valves do nothing to "exhaust" the sewer gasses to the air. Somewhere in the system, you'll still need a standard vent to accomplish this. |
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Estaplace.com is one the Ceglia Giovanni projects, started on 20 July 2005, and online since 20 August as a real estate platform for listings, mainly operating on the Italian and American/English market in the Internet, Estaplace would like to become the point of referiment for home sellers and home buyers, a site where private owners or real estate agencies can have the possibility to show their offers to the world. Estaplace.com is only one of the Giovanni Ceglia's sites. Everyday Giovanni Ceglia works to improve new Internet tools and services for online marketing and business. Estaplace.com will become the biggest portal for real estate business and investments online.