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Author:
Fantastical (WA)
My next plumbing challenge (big thanks to the help I got on my last post!) is the vanity in the basement bathroom. I'd like to tie into existing plumbing that services my washer and laundry sink. Hopefully the picture is helpful. Based on the picture, is there any problem adding a sink in the bathroom right in the middle of the 'rectangle' that goes from the drain and vent to the sink or should I go about this a different way. Sorry I don't know the technical terms for these things! I appreciate any advice on how to best utilize the existing drain and vent for adding a bathroom sink (and is it possible?). Thanks!
[i288.photobucket.com]
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Author:
North Carolina Plumber (NC)
Put a combination in the drain pipe, come up vertical and put a tee for the sink drain and then a tee in the vent pipe. That's about as simple as it gets.
By code your vent pipe is too low, but that's outside the scope of the original post.
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Author:
Fantastical (WA)
Can you clarify what you mean by putting a combination in the drain pipe? Thanks!
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Author:
steve (CA)
You cut the horizontal drain pipe going to the laundry sink and install a "combo" tee, with the branch pointing up. Come out of the combo with a pipe up to a sanitary tee, with the branch of the san tee pointing into the new vanity. Come out of the top of the san tee to a tee installed in the horizontal vent pipe for the laundry sink. The existing horizontal vent pipe should have been installed at least 6" above the flood level of the laundry sink. If you want to legalize the piping, the horizontal vent pipe would need to be raised.
Also, the non-shielded "Fernco" couplings that were used to install the vertical pipe into the existing galvanized pipe might not be legal. They might need to be shielded couplings.
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Author:
packy (MA)
while you are doing the work, cut the galvanized vent up about a foot, use a sheilded rubber coupling and add a cleanout tee for future use. you'll be glad you have it, someday..
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Author:
steve (CA)
Also, put blocking in to properly support/strap the clothes washer standpipe.
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