To rebuild your Velo PV2 doser check valves

This kit is used when replacing the ball and spring of a Velo PV2 doser. This kit includes (2) of item 101728 doser balls, (2) of item 101740 spring and tip,(2) of item 101850 piping gasket, (2) of item 101730 small O-Ring, and (2) of item 101840 large O-Ring.
If You need the valve seat that wears much slower please see item 101820.

This part is known to be compatible with the following machine models: Velo DE filters 5 sq meter and up