I turned on my shower and using a funnel filled a one gallon pail. it took 60 seconds.
I fill a plastic tub with the water coming out of the shower head while waiting for the warm water then dip my cloth in that to get a soapy wash, after
rinsing I use whatever is left in that tub, usually a half gallon or so, for the next toilet flush. I can get 5 showers and dishes,not many, plus hand
washes on 38gallons. I estimate that my showers use 2.5 gallons per event. I turn on the water pump to charge the lines then turn it off before
washing my hands, every drop counts.