hat
5 gpm pa pieds carrés de medya se pi bon kondisyon plan pou filtration. Pou relativman dlo, ou mèt ale pou plan kritè de 15 gpm pa pieds carrés Backwash règ yo ki te konn chita sou 25 psi pwesyon ane ke yo bliye.
eng
5 gpm per sq. ft. of media is the best design condition for filtration. For relatively clean water, you may go up to design criteria of 15 gpm per sq. ft. Backwash flow rate based on 25 psi pressure drop.