All DEMA housekeeping dispensers use the same proportioners, backflow preventers and metering tips. Proportioners are available with flow rates of 4 gpm (15 LPM), 2.5 gpm (9.5 LPM) and 1 gpm (4 LPM). Standard proportioners are equipped with ASSE 1055 approved 16-30 Action Gap backflow preventers. Air gap backflow prevention is available with a 4, 2.5 and 1 gpm proportioner.
