Cartridge Set 4 x 20" Jumbo Cartridges:

First stage 20 Micron Pleated, Second stage 5 Micron Pleated, Third stage 5 Micron KX Carbon, Final stage 1 Micron Meltblown

Always relubricate the sump orings and the sump threads; this enables hand tightening to achieve a seal, which reduces flattening of the sump orings. Sumps will gradually tighten due to the impact of pump pulsations.