Excellent for ensuring consistent ultra pure water quality with respect to particles and bacteria immediately prior to dispensing. Compatible water purification units are Purelab classic Mk2, Purelab flex, Purelab flex 3, Purelab flex 4, Purelab option-E 5/10, Purelab option-Q, Purelab option-R 7/15 and Purelab ultra Mk2.