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What Ink Does the Epson EcoTank ET-3950 Use?
What Ink Does the Epson EcoTank ET-3950 Use?
September 3, 2026 —
Quick answer: the Epson EcoTank ET-3950 uses Epson 502 ink bottles — not cartridges. Four bottles, one per tank, and there is no XL tier, because a bottle simply fills a tank rather than being a fi...
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Epson Maintenance Box: Where It Is, When to Replace It, and Which One You Need (T04D1, C9345, C9344)
Epson Maintenance Box: Where It Is, When to Replace It, and Which One You Need (T04D1, C9345, C9344)
September 27, 2026 —
Published September 27, 2026. Written by William Elward, founder of Castle Ink.
Quick answer
An Epson maintenance box is a replaceable waste-ink container. It collects the ink the printer flushes d...
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September 27, 2026 — Published September 27, 2026. Written by William Elward, founder of Castle Ink. Quick answer An Epson maintenance box is a replaceable waste-ink container. It collects the ink the printer flushes d...