HP Designjet 4000, 4500 Ink Tube System Ink Supply Valve (single) Designjet4520 This is the stand-alone 422W

This is the stand-alone 422W power supply without the logic board or formatter board

Designjet Z5600

Designjet Z3200 carriage PCA

Front control panel for the Designjet Z3100 plotters

HP Designjet 4000, 4500 Ink Tube System Ink Supply Valve (single) Designjet4520 This is the stand-alone 422WHP Designjet 4000, Designjet 4500 Ink Tubes System Supply Valve Assembly, Rebuilt and Upgraded Half of the ink tube assembly failures are caused by leaking ink supply valve assemblies. OEM seals harden and crack over time, allowing ink out and air in. If your Designjet is having frequent print head errors or you see ink leaking under the ink supply station, this is most likely the part that is failing. The LPS refurbished valve assemblies use silicon