I have 2 family house where 1st floor drainage system working fantastic. Now, 2nd floor bathtub and kitchen sink is connected to my basement bathtub drain. My basement bathtub backs up sometimes and after a while the water goes away. Sometime I see some bubbles in basement bathtub when someone take shower in second floor. I ran 50ft drain snake through my basement bathtub and nothing is stuck.
I’m guessing it’s some kind of venting problem.
Anyone know how to fix this issue without calling a plumber and paying lot of money?
Plumbing – Basement Bathtub Backup
drain-waste-ventplumbing
Related Solutions
Why do you think the bathtub is not currently vented?
Not all traps need to be individually vented so you're not always going to see a vent if you don't know what to look for. It's a little hard to tell from your photos, but I think your bathtub is wet vented through the kitchen sink:
Please correct me if I've got the arraignment of your pipes wrong.
I think what happened is, when the snake got to the "T" where the horizontal pipe meets the tower, it went UP.
A metal snake is always bent a little, which makes it tend to go one way or the other when it gets to a junction. If you remove the tape, turn it over, and reinsert it, it might go DOWN instead when it gets to the "T" - the bend in the tape will make the tip point down instead of up.
But it would be easier to just snake straight down the tower. You have cleared the pip from the drain to the T, so going straight down the tower should be fine.
Just remember to go nice and easy with the snake!
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Best Answer
This doesn't sound like a venting problem.
If your basement bathtub is backing up, I assume it is the lowest point in your plumbing drainage piping. This typically means that the sewer service line to the city is clogged or restricted.
What snake did you use? How far from your property to the city sewer main? 50' doesn't sound like enough. How old is the house / sewer line, do you trees on your property? You might also want to rent the scope to see the problem.
Rent the 100' sewer snake from homedepot and run that from your house out to the sewer main.