I put the faucets at the bottom of each barrell and the top is not sealed, just gravity with the barrells setting 24in's high on platform. The pressure or flow rate is not as important to me as even distribution over the mater patch. Is 1/8in holes small enough, I was just concerned about plugging up from dust and etc. that will blow into open barrels. I plan on just opening the valve each morning to let the water drain at its leisure while I go on to work. That way each barrel will have time to rid itself of some of the chlorine before I need it. 8)
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