How to tie into this main line

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How to tie into this main line
Author: capz (MA) Hi all. I'm trying to find the best way to tie a utility sink drain into this main line. I initially had it going into the old washer drain on left with a pump. Then the pump failed. I'd rather not keep buying pumps. Any info much appreciated.
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Re: How to tie into this main line
Author: capz (MA) Picture did not show? [postimg.org]
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Re: How to tie into this main line
Author: packy (MA) if you can put the sink over to the right, just tie into that 2" down low.
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Re: How to tie into this main line
Author: hj (AZ) You mean the one with the "revent" tied into the main line? That must have been installed by someone who heard that "anyone can be a plumber", or lurked around the Internet until they found someone who told them it was okay to do it that way.
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Re: How to tie into this main line
Author: packy (MA) what do you mean? that could be a 3" vent for the washer drain..
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Re: How to tie into this main line

Author: hj (AZ)

It makes no difference. It could be a 12" line and the vent is still tied back to the system (below the Overflow line of the HIGHEST fixture), in such a way as to become a "secondary drain line", if something happened so the vertical line could back up far enough for the water to overflow into the vent and then back down into the main line. It is problematical whether it WOULD ever happen, but codes are written for the "could it happen" situations.

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Re: How to tie into this main line
Author: packy (MA) quote "could it happen" situation.. do you mean "could it happen" that the D-backs will lose 161 games this season? they are no there way..
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Re: How to tie into this main line
Author: hj (AZ) Well, 1 and 5 is a start to that. If plumbing were only installed according to what WOULD happen, instead of what COULD happen, all of these cockamammy ideas DIYers come up with would be okay.
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