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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.
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.
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.
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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