Check whether the spout filter is blocked by something bulging. This head may not be easy to open over time. You need to use a wrench to open it. If it is still not getting better after cleaning the filter, take a look. Check whether there are any foreign objects at the water inlet end of the figure-eight valve under the basin, which may be trapped and cause the water flow to be sluggish (this figure-eight valve must be cleaned by someone who understands plumbing, and the water needs to be stopped first.
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