Digital BW, The Print

Hi,

I am switching my MIS CFS system from Piezo ink to 
MIS VM ink and didn't particularly want the two to mix.

By detaching the tube from the "elbow joints" on top
of the carts and moving the cart to a sink I can get a tube to feed 
water in from my cold tap.

My question is whether  water is the best for flushing out
this pigmented ink from the foam in the cartridges ?

Presumably the ink is water soluble, or held in a solution ?

Thanks 

Josh 

PS - In the UK www.dabs.com is a good source for 1160 printers