The toilet is full of water and does not need to leak, and it also penetrates downstairs, is the toi

1 Find a plumber to do a closed pressure test to see if the water pipe is leaking or which faucet that is connected to the wall The angle valve or something is not tightened along the wall and between the tiles The water flows down If it is convenient, turn on the floor heating or heating to see if it is leaking of these two kinds of leaks 2 If the first item is sure that there is no problem, disassemble the bathroom gusset to see if it is a leak upstairs along the sewer pipe and leak downstairs to your house and whether it is a leak in the bathroom next door to the wall As a result, his house is very waterproof and flows to your house through the wall 3 If the first two steps are fine, remove the toilet to see if it is not done well when the double toilet mouth is not blocked, remember to use glass glue to beat the tile joints under the toilet when re-installing the toilet, so that the bottom of the toilet is a sealed environment and don't use all the sewer including the washing machine shower wash basin sewer to see if these sewers have been changed and leak 4 If the first three items are okay and the downstairs is still leaking, I didn't say at least your home waterproof is definitely not good After taking a bath is also a problem It can only be planed off and redone waterproofing Heavy tiling.