The Conid + Allen key are necessary to completely disassemble the pen. This is a nice asset if you would like to maintain and thoroughly clean your Bulkfiller.
Cleaning can also be done by flushing the pen. The Bulkfiller mechanism allows for a great flow to be rapidly sucked into the pen and be squeezed out again. These cause a lot of internal turbulence which cleans the pen good enough for an ink swap. (for example another colour or brand).
The tooling is not required at all to perform flushing.
For any questions regarding the (dis)assembly of our Bulkfillers, please visit our how-to section.
Our Conid tool can be ordered when purchasing a Bulkfiller.