Diletta Alto

MakerDiletta
BoilerDual boiler
Brew boiler0.75 L
Steam boiler1.6 L
Water tank3 L
Plumb-inNo
Voltage (US)120V
Maker's water filterNot listed

What water does this machine require?

Diletta hasn't published a limit our check can use for this machine yet, so the check can't give it a result. Whatever the maker does say is quoted below.

Will my water work with this machine?

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The maker's water guidance

What the maker says this machine needs from its water. This is machine care, not drinking-water advice.

From Diletta (Seattle Coffee Gear)'s guidance for this model.

  • Water type

    “The machine must be operated with soft, clean drinking water. If your local water supply has a high mineral content, use a water softener, water filtration system, or bottled water.”

    Diletta Alto User Manual (PDF created 2024-10-01), Water. Source (opens in a new tab), saved October 28, 2026.

  • Descaling

    “With the use of filtered or bottled water, regular descaling is not required. Damage to your machine can result from improper descaling. Descaling at home is not recommended.”

    Diletta Alto User Manual (PDF created 2024-10-01), Descaling. Source (opens in a new tab), saved October 28, 2026.

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Specs read from the maker's or seller's page.