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Rob Wotzak, Web Producer
posted in: Blogs, kitchen, plumbing, built-ins
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Vent a Kitchen Island Sink with an Air-Admittance Valve
comments (2) July 4th, 2010 in Blogs
Rob Wotzak, Web Producer
Air-admittance valves work simply and offer venting flexibility.
by Lynn Underwood
Suction opens the valve, and gravity closes it
| Sewer gases trying to escape seal the diaphragm to the rim of the air-inlet basket, which keeps the gases inside the pipe. When a sink is drained or a toilet flushed, this slight positive pressure is relieved because air is sucked in through the basket. This rushing air pushes up the diaphragm, connecting the basket to the drainpipe. After the flush, gravity drops the diaphragm back into place. Click to enlarge image |
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You can vent more than just one sink
| Large AAVs | |
Medium AAVs | |
Small AAVs |
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| 160+ DFU; $35. Cap a main vertical vent stack in the attic and vent most fixtures in a house. | 20 DFU; $30. Can cap a vent stack in the attic or vent a high-volume horizontal branch line. | 6 DFU; $25. Can vent a single horizontal branch line, such as a bathroom. |
| Read the complete article... Vent an Island Sink...and Other Tricky Spots A handy one-way valve eliminates most of the plumbing work by Lynn Underwood  |
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posted in: Blogs, kitchen, plumbing, built-ins
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