HP 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 seals that do not react with ink or oxygen.  The OEM seal is  simple synthetic rubber.  All assemblies are leak tested at twice normal operating pressures.  The assembly has a 1 year warranty.

This valve assembly fits the following tube system: 

Designjet 4000

Designjet 4020

Designjet 4500

Designjet 4520

Q1273-60050, Q1273-60300