There is a smell from the drain in my bathroom toilet, and the faint smell is not good, please ask w

What the subject said should be a sinkhole. The difference in the height of the spout in a living room does not affect the drainage, and the key is that the sewer pipe must be able to drain smoothly. In other words, each branch drain can be drained smoothly to the main drain pipe, so that even if the downspout height is different, it can be drained smoothly. >>>More

No, unscrew the big screw under the pool, and then change the sink drain to a washbasin, but you need to use a larger wrench or pipe wrench, and you must also put glass glue, I don't know how to ask, I hope it can help you.

Not compliant! Above ground level is not good for drainage! If it's serious, it will affect the use!

Check the water outlet of the hot water faucet, if it is small, it should be a problem caused by the surface scale of the temperature measuring probe of the hot water port. >>>More

It's because the dirty pipe downstairs is blocked.