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Closing the lid of the toilet when draining water can reduce the sound of draining.
Sponge seal the lid of the sink to reduce the sound of pumping.
The toilet flushing sound is not very loud. At night, when my family got up to go to the toilet, I didn't hear a sound before I fell asleep, but Sun Rang, who passed by my door, turned on and on the light at the good time and found that she still had no lead shed to sleep.
The toilet flushes loudly and loudly, and most of them are caused by it.
In general, a direct-suction toilet flushes more loudly than a siphon toilet, or if the sewer is not properly installed, it will also cause it to be loud. If it's the toilet reason, it is recommended to replace it directly.
Change the flush valve.
Buy Anwar's, the Anwar toilet I use at home is clean and quiet, the quality is good, and I have been using it for several years.