Originally Posted By: jpeck
This post was automatically imported from our archived forum.
That's a problem when trying to use the plumber's test ball, but not when using the shower tester.
Water DOES soak into the grout and through, down into the pan, through the weep holes into the drain. You are trying to stop that, the shower tester does not.
If you are marking the water level, then checking the water level, that is not producing a good shower test. When there is only a pan, that works fine, but not once the concrete base, thin set, etc. have been installed.
The test you are missing is the drain line test.
The shower tester test everything at one time: pan, supply lines, riser to shower head, and the drain line.
You turn the water on, let it fill up to and over flow into the shower tester, flowing into the drain. If water leaks under the tester, it does not matter as long as the shower still fills up to the height of the shower tester.