Hi, Around late December my kitchen sink started to drain real slow, so I got a snake and snaked out he lines. Pulled back the usual "black goo" and everything seemed to be fine. Then this weekend I doing A little yard work and notice water coming out from behind the siding. Upon further inspection, I found an old cast iron tee fitting had been leaking, pin size hole in it. I pulled it out and replaced it with new fittings, but the sink is slow again. Not as slow as it was before the snake. It seems to bubble and gurgle which kind of makes me think It might be the vent line clogged. I just wanted some other opinions before I climb up on the roof. Any help would be greatly appreciated. Thank you.

A clogged vent would , indeed, make your sink drain slower.
The "gurgle" you hear is the sound of the sink attempting to vent through the trap. Snake from the kitchen roof vent. Put out enough cable to reach the base and 20 feet more to get out to the main. Good luck, Tom

Hey speedball1, It just occurred to me I might have left out vital info. I can run the water for a bit before the sink starts to back up. Is this still indicating a vent block? Not sure if it matters, just want to be on the safe side. Thanks

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Originally Posted by nova0525

Hey speedball1, It just occured to me I might have left out vital info. I can run the water for a bit before the sink starts to back up. Is this still indicating a vent block? Not sure if it matters, just want to be on the safe side. Thanks

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If it were me I'd snake them both. When you snake from the roof put out enough cable to reach the base and 20 feet more to get out to the main that clears the vent AND the branch. Remove the "J" bend and run a snake up into the wall,(see image). You'll hit a 90 about 8 inches in but once past thatyou only have to put out 5 feet more. Flush the lines with hot water. Good luck, Tom