If you have to hold your drain lever down for the tub to drain it is more than likely the tension spring on the back of the overflow plate.
Bathroom floor drain diagram.
Here are a few bathtub drain schematics and bathtub plumbing diagrams.
Fairly simple drain system.
The center of the lav s drain is located 18 approximately above the finished floor.
The bathroom sink s water lines are roughed in 3 inches above the drain.
If a drain line is nearby you may choose to run a pipe to it rather than running a new line.
You can replace just this plate at your hardware store for a few dollars.
Also notice the drain is centered right in the middle of this 30 inch vanity.
However it may be difficult to run a toilet s 3 inch or 4 inch drain to an.
The drainpipes collect the water from sinks showers.
2 free plumbing diagrams are available.