Connecting to Main Stack - Venting and Suction issues?

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Old 05-17-09, 04:36 PM
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Connecting to Main Stack - Venting and Suction issues?

Hi. I'm hoping someone can help me out. I have a home with a basement. I would like to install a sink in the basement. The sink would be located approximately 3-4 feet from the main stack that services half of my house. I would like to 'tie' into the main stack if possible if that is according to code. My first question is can I tie into that 4" main stack? My second question is do I need to 'vent' the sink since I am 3-4 feet from the connection to the stack pipe? I have 2 toilets on the 1st floor 'above' where the sink is going to be placed. Do I need to worry about the water in the trap under the sink being suctioned out of the trap when the toilets flush? Your help and advice is very much appreciated. Thank you.
 
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Old 05-18-09, 03:34 PM
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Tie Into Stack

Yes you can tie into that stack. Yes you need a vent, it has to be run 6in. above the flood rim of the highest fixture tied in and then you can vent it into the stack-vent, luck.
 
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