Hi, I have a "plunger-type" bathtub drain that does not drain so well. The problem is that I do not understand the mechanism. I wonder if there is an open/close system other than the plunger, which is stuck at "closed" position. This is the second time this happened, and this was what happened the first time:
1- Took off the face plate, the whole plunger system (which looked fine). It still does not drain well.
2- Snaked in from the hole for the overflow, pass the P-trap, to about 4-5 feet, but nothing really hit.
3- Stuck in a thin plastic flexible wire (designed for snaking) from drain to the vertical pipe attached, but nothing really hit.
4- Tried sealing the overflow with wet rag, tried a plunger, but did not solve the problem.
5- Reinstall the plunger system and the face plate and turned the switch up and down rapidly several times. Only made the situation worse.
6- Upon desperation, kept trying the snake several times. And at one point, the water drained. I am not sure when it happened.
This happened about 4 months ago. And now it started to drain slower again! What could be the problem? There are tons of diagrams of plunger-type tub drains, but I cannot figure out what is closing/opening the drain. Please help!