The unit "millimeter water [4 °C]" is a common misspelling for millimeter water [4 °C].
Full name: millimeter water [4 °C]
Plural form: millimeters water
Symbol: mm H2O
Alternate spelling: mm water
Category type: pressure
Scale factor: 9.80665
The SI derived unit for pressure is the pascal.
1 pascal is equal to 0.101971621298 millimeter water [4 °C].
Valid units must be of the pressure type.
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