1 Here καί (kai) has been translated as “then” to indicate the implied sequence within the narrative.
2 Grk “he”; the referent (the angel mentioned in 21:9, 15) has been specified in the translation for clarity.
3 Grk “proceeding.” Water is more naturally thought to pour out or flow out in English idiom.

In other versions

Then the angel showed me the river of the water of life, bright as crystal, flowing from the throne of God and of the Lamb

Then the angel showed me the river of the water of life, as clear as crystal, flowing from the throne of God and of the Lamb

Then he showed me the river of the water of life, clear as crystal, flowing from the throne of God and of the Lamb

Then the angel showed me a river with the water of life, clear as crystal, flowing from the throne of God and of the Lamb.

And he showed me the river of the water of life, clear as crystal, coming out from the throne of God and of the Lamb

And he shewed me a pure river of water of life, clear as crystal, proceeding out of the throne of God and of the Lamb.

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