Replace it when the printer asks for a new printhead, or when missing lines, banding or wrong colours remain after you run printhead cleaning and alignment from the front panel. It is designed to be replaced by the user. If you are unsure, our HP-certified engineers can check the plotter onsite.

One HP 729 printhead and four introductory cartridges: 40 ml cyan, magenta and yellow, and 69 ml matte black, so the printer can run straight after you fit it. One printhead prints all four colours, and it fits the HP DesignJet T730 and T830.

Yes. HP covers the printhead for 12 months after installation, until the warranty-end date printed on it, or until 1,000 ml of ink has been fired, whichever comes first. Keep the box and invoice; if a printhead fails within cover, we help you claim a replacement from HP.

HP 728 ink: a 300 ml matte black and 130 ml cyan, magenta and yellow, each replaced on its own. HP 738 ink for the newer T850 and T950 will not fit the T730 or T830, so check your printer model before you order.