What Size Ink Tubing Should I Use for the Epson ET-8550 (Non-DTF Printing)?

Question:
I'm using an Epson ET-8550 for regular printing - not DTF. What size tubing should I buy for the ink lines?

Answer:

For your Epson ET-8550, if you're using it for normal inkjet printing (not DTF), the correct tubing size is C2. This refers to tubing with an inner diameter (ID) of 2 mm and an outer diameter (OD) of 3 mm. It's the same standard size used in most Epson EcoTank and similar ink delivery systems designed for dye or pigment inks, ensuring optimal ink flow without overpressure or leaks.

Using larger DTF-specific tubing (like 3 mm ID / 5 mm OD) isn't necessary - and may even cause poor ink control or air gaps in a standard print setup. The C2 size maintains proper negative pressure in the ink lines, which helps prevent ink backflow and maintains smooth, consistent printing.

If you're replacing the tubing, ensure it's solvent-resistant if you plan to experiment with pigment inks or third-party inks in the future. Otherwise, standard silicone tubing of the same C2 specification will work just fine for normal applications.

Addressing printer issues can be a complicated affair due to the hands-on nature of the problems. So, we're not able to provide remote troubleshooting, suggestions, or support for printer repairs. We offer an in-person evaluation and repair service via our local diagnostic facility (https://bchtechnologies.com/printer-repair-service). Given the high demand, we operate on a first-come, first-served basis, so it might take a few weeks before we can get your printer dropped off. Our services cover full printer or part repairs with clear guidance on how to proceed. However, since our rates may not be the most economical, we encourage DIY learning through research. Start by visiting our YouTube channel (https://youtube.com/@bchtechnologies) and use the search function to find videos on tubing, ink flow, or maintenance. With over nine years of content, it's the fastest way to locate exactly what you need.

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