If the expansion joint in the bathroom is not tightened, will it leak

The amount of work is not small, hehe.

Water leakage is not going to be the main recommendation for you on a few points: >>>More

There is no need to set up a telescopic joint in the toilet riser, because the temperature difference does not change much!

In fact, the toilet should not leak when it is installed with a booster rod.

Water leakage can be detected by a closed water test.

The closed water test needs to be done after the waterproofing is done, and it can only be done when it is dry, and in the case of no waterproofing, Qiancheng should not do the closed water test, otherwise it is likely to cause serious problems downstairs. >>>More

The simplest and most effective way to do a closed water test. >>>More