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Old 07-24-2013, 07:09 PM
 
93 posts, read 288,779 times
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I live in southern Orange Co. at the Chatham Co. Border, in Chapel Hill. I need a sink installed in my garage. My garage is a separate building from my house, about 15' away from the main house, and is not plumbed. I have gotten estimates from 4 plumbers. I will not mention the plumbers names, but the estimates range from $6500 all the way down to $1500 for the exact same job to be done. This is a huge discrepancy and I am overwhelmed by this process.

Two of the 4 plumbers who came to estimate said that the sink needed to be vented in order to pass inspection. The other two said venting for a sink is absolutely not needed to pass inspection.

Does anyone know what the building codes for Chapel Hill are for just a sink? I could see venting a toilet sewage line, this will be strictly grey water, medium duty.

Also, if anyone knows of a trustworthy, honest, fair plumber could you send me a message with their name and/or contact info. I would really appreciate any answers people may have.

TIA
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Old 07-24-2013, 07:24 PM
 
Location: Near Falls Lake
3,540 posts, read 2,481,201 times
Reputation: 3520
In order to drain properly a vent is needed. That being said, an air admittance valve could probably be used. You may want to contact the inspections department and pose the question to them directly.
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Old 07-24-2013, 08:31 PM
 
Location: Chapel Hill, N.C.
36,502 posts, read 49,366,334 times
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we've used Sparrow successfully before but not for anything like this. They were not cheap but who is in Chapel Hill?
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Old 07-25-2013, 05:13 AM
 
843 posts, read 1,987,831 times
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It has to be vented. Call the inspections office and ask. If I remember correctly, and I am not a plumber, you have to have at least one vent through the roof. You can also use a studor vent that installs under the sink. These are popular with kitchen island sinks. But I still think there has to be one vent to the outside or an 'atmospheric vent" as they call it.
Call to be safe.
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Old 07-26-2013, 06:08 PM
 
93 posts, read 288,779 times
Reputation: 89
Thank you for all of the replies. I called the Building Code Dept in CH and I asked the gentleman I spoke with if a self-venting valve was sufficient. He was not sure as I have a vented house, so he looked it ip.

The code states that every building on a property that contains a sink must have a roof vent. He thanked me for teaching him something new. I was happy to help.

Thanks for all the responses, and pm"s
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