Common to all 1100/1200 pump modules, the purge valve has a gold seal held in place with a plastic cup

• The most frequently replaced item in the 1100/1200 Series pumps is the purge valve PTFE frit, which can clog with seal material or solvent particulates
• When replacing the frit, remember that the cutout in the frit goes on top so that more surface area will be provided on the side facing the solvent flow