前两年换showerhead发现加州对淋浴喷头的流量有限制，最大流量为每分钟 1.8 加仑

California has a limit on showerhead water flow

, which is stricter than the federal standard. The maximum flow rate is

1.81.8

1.8

gallons per minute (

1.81.8

1.8

GPM), a requirement in place since 2018 to promote water conservation. 

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