Our Sullair Equivalent Minimum PressureCheck Valve Repair Kit contains the necessary springs,packing, and piston for repairing the MPCV on all ES-8Series Compressor Models. eIndustrialSolutions provides quality Sullair equivalent parts thatmeet or exceed the OEM specifications. Aftermarket parts are morecost effective than brand name parts and can typically allow for areduction in your annual maintenance costs over the life of thecompressor.