The routine use of highly concentrated buffer solutions (100 mM) will reduce the life of the seals and pistons in your 1100/1200 Series pump. You can counteract the problem with one of our seal wash kits, which flushes the backside of the seal with a wash solvent; water/isopropanol (90/10) is recommended as the wash solvent. The continuous seal wash uses gravity to flow the wash solvent, and is compatible with all 1050 and 1100/1200 standard and capillary pumps. The active seal wash uses a peristaltic pump to flow the wash solvent, and is compatible with 1100 pumps with the following serial numbers and higher, as well as the 1200 Series pump:
G1310A
G1311A
G1312A