Our one and only bathroom sink is draining slowly and it's driving me a little crazy. I have watched a number of videos on how to correct the issue and tried them all. I have cleaned the "P" trap and snaked the sink pipes and vent (to a about 3 or 4 feet. I didn't want to force the snake. I will be trying to go in further today). I also cleaned out the overflow. I have found no obstructions. The water in the sink just seems to start backing up as soon as the water from the tap hits the water in the "P" trap. Am I missing something obvious. As I said I am going to try and snake into the pipes again today and try and get around corners that are obstructing the snake. If anyone has any thoughts please let me know. I really don't want to spend a lot of money for a plumber on something that should be simple to remedy.
To bring the issue to a conclusion I ended up bringing in a plumber. It took him about ten minutes with a powered auger to locate the partial blockage in the pipe. The blockage was located about 12 feet into the pipe. It was an expensive resolution for 10 minutes work but at least the issue has been resolved. I will perhaps purchase a better auger so as to deal with future issues. Thanks to all that gave suggestions on how to deal with the issue.
Have you tried Red Devil Lye? Its pure granulated caustic. Don't get it on your skin or eyes, be sure to wear gloves and eye protection. Put a quarter to a half cup down the drain and pour warm water on it. It will start reacting as soon as the water touches it, and might bubble up. The trap will get hot to the touch. Anything organic in the pipe will be dissolved. Wait about 10-15 minutes and flush with warm water again. Its heavy duty stuff, and works where liquid / gel drain cleaners don't.
A snake will only get major obstructions. It won't work on what's most likely the cause which is hair combined with soap and dirt.
Trust me, this works great: I always use the hair removal + baking soda + vinegar + hot water method. I've personally done this dozens of times and it always works.
Before you do anything, get all the hair out of the drain that you possibly can. This will require using needle nosed pliers to get all the hair you can see that's close to the drain. Then follow up with the barbed hair removal tool as shown in Fig.1 to get the hair that's deeper into the pipe.
Next, pack regular baking soda as far into the drain hole as you can until you can't pack any more. Next, start pouring vinegar down the hole. Let the vinegar dissolve and react with the banking soda. This is a gradual process. Pour a little at a time. When that's all done, pour boiling water down the drain and it should work fine.
I've personally done this dozens of times and it always works.Fig.1. Hair extraction tool