Originally Posted by
massplumber2008
Hey jackofall...
Are washing machine and/or dishwashers allowed in your coop?? If not then you need to investigate this as it may be that the kitchen sink drain pipe is simply to small to handle the discharge from a washing machine and dishwasher at the same time...
Otherwise, sounds like the drain is clogged. You can try filling the sink with 3" of water and then try to PLUNGE the drain using a plunger..see if that helps here.
Best case will be to go to a tool rental store and rent a small electric drain machine (see picture). You will also want to purchase a pair of safety glasses and leather gloves. Then snake the drain pipe...be careful as the snake can go vertical almost as often as it can go downward. If possible have someone at the floor below you to confirm (by hearing it) that it is going down...then snake the drain another 10-15 feet and see if that helped.
Repeat this a few times, then fill sink with hot water and FLUSH the drain pipes clean.
If this doesn't fix the drain issue at the sink...like I said at the beginning then it may simply be that the pipes are not large enough to handle the volume being sent down the drain.
My bet is that the drain is plugged.
Let me know what you think...
MARK