It mainly depends upon the showerhead.
The original generation of showerheads typically dispensed 3.5 to 5.0 gallons per minute (gpm) which would be between 53 and 76 liters in 4 minutes.
The first...
First, you must find the gallons per minute (GPM) of the shower head. (You can request a "flow bag" from your local water agency/supplier) Follow the directions on the bag to measure the gallons per...
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