Will a problem with the wiring in the kitchen cause the whole building to trip

As long as there is water pressure in the water pipe, it will not flow backwards, and the water on the toilet bowl is set in the water tank and will not flow backwards.

This won't, but the current toilet cleaning block is not of good quality and will clog the toilet. Tap water turning blue is fake and not credible.

First of all, find out if the smell is coming from a floor drain or a toilet pipe. If the floor drain is installed with a water-filled anti-return structure, it is estimated that the problem is not big, and the most likely problem is the toilet. You probably have an entire building on the lower floors, and the problem is caused by the water flushing of the toilet from the upstairs users, which will spill the odor from the pipes from your toilet.

According to your description, it may be that there is a problem with the printer interface or the corresponding computer interface, you may use other cables to try these two interfaces to determine if there is a problem with these two interfaces. Since I'm not very professional in this either, I've only thought of this method, and I hope it will be useful to you.

The square wire is enough for a single wire, and the ordinary socket is bought with 5 holes and 10A. Directly to the shunt switch, (L to the live wire, N to the zero wire, and one is the grounding wire) 3 one way, the air conditioning socket is 16A. The mechanical and electrical wiring of the large cabinet should be replaced with a thickness of more than 4 square meters. >>>More