What should I do if I can t find the cause of the leakage from the upper floor to the downstairs in

Find a professional plumber to check, you will definitely be able to find out.

In fact, it is very simple, you find someone to suppress the water pipe to know whether it is leaking, if it is not leaking, the probability is high that the ground water to the tile and then seep down, accumulated there, it will also drip for a while, how long to see how much water is accumulated, but also to observe whether there are other sources of water, such as adjacent to whether there are other toilets, more information, better advice, free concrete waterproofing and leakage water repair technical advice, to avoid today's repair, tomorrow's leakage, every year to repair, every year to repair the trouble.

What you say is too simple!!

It's your leak! It's still upstairs and downstairs leaking!! Or the water tank is leaking... >>>More

Water seepage after draining, you should consider whether there is a problem with the drainage pipe, the water pipe under the tile seepage, when you start to put it, the water goes under the tile, it has not seeped down, and it will come down after a while, which is one that may be higher! When you test the water, the bathroom next to it is not also water, if you use it, it is not easy to judge, it should only test the water in one place, and other places can not use water to judge, more information, better advice, free concrete waterproof and leakage water repair technical advice, to avoid today's repair, tomorrow's leakage, every year repair, every year leakage troubles.

The test you did was basically correct. According to your statement, it can be judged that it is the water inlet pipe dao >>>More