Impulse Flush Valve to suit MK4 Button

This Listing is for a Impulse Flush Valve to suit the impulse MK4 push button.  The valve will be supplied with a new donut washer and nut.  This will not fit directly in to the older Mk1 base units, if your cistern has this, you will need to remove the cistern from the toilet pan and change the base station over to the MK2 which is supplied in this pack.