Das Trinken von Wasser ist wichtig.

Because Trinken is being used as a noun, not as a normal verb.

In German, verbs can be turned into nouns. When that happens, they are capitalized. This is called nominalization.

• trinken = to drink
• das Trinken = drinking

So in Das Trinken von Wasser ist wichtig, das Trinken means the drinking or more naturally just drinking.

Because Trinken is a neuter noun here, so it takes the article das.

When a verb is turned into a noun in German, it is usually treated as neuter:

• das Essen = eating / food
• das Lernen = learning
• das Trinken = drinking

So das Trinken is the correct form.

Because this sentence uses the noun form das Trinken, and once you use a noun, German often connects it to another noun with von.

• Wasser trinken = to drink water
• das Trinken von Wasser = the drinking of water / drinking water

This is similar to English:

• to drink water
• the drinking of water

German could also say Wasser zu trinken ist wichtig or simply Wasser trinken ist wichtig, but das Trinken von Wasser is a noun phrase.

Because Wasser is being used in a general sense, like water in English.

German often leaves out the article with uncountable substances when speaking generally:

• Wasser = water
• Milch = milk
• Brot = bread

So von Wasser means of water or water in general, not a specific water.

If you wanted to talk about specific water, you might use an article in some contexts, but here the general form is the natural one.

Yes. The whole phrase Das Trinken von Wasser is the subject.

The sentence breaks down like this:

• Das Trinken von Wasser = subject
• ist = is
• wichtig = important

So the basic structure is:

[Drinking water] [is] [important].

Because German main clauses normally place the finite verb in the second position.

Here, the first element is the entire subject:

Das Trinken von Wasser | ist | wichtig

Even though the subject contains several words, it counts as one unit before the verb.

This is a very important German rule: in a normal statement, the conjugated verb usually comes second.

Yes, absolutely. Wasser trinken ist wichtig is also correct and very natural.

There is a small difference in style:

• Wasser trinken ist wichtig = more direct, using the infinitive phrase
• Das Trinken von Wasser ist wichtig = more noun-like, slightly more formal or abstract

Both mean basically the same thing.

After von, German uses the dative case.

So in von Wasser, Wasser is dative.

However, Wasser does not visibly change here because the noun itself often stays the same in the singular. You mainly notice the dative more clearly with articles:

• von dem Wasser = from the water / of the water
• von einem Freund = from a friend

In your sentence, the case is dative even though Wasser looks unchanged.

Almost, but there is a possible ambiguity in English that German avoids more clearly.

In English, drinking water can mean:

1. the act of drinking water
2. water meant for drinking

In German, Das Trinken von Wasser clearly means the act of drinking water.

If German wanted to say drinking water as a type of water, it would usually say Trinkwasser.

So:

• Das Trinken von Wasser = drinking water as an action
• Trinkwasser = drinking water as a substance

Not in a normal statement like this.

German main clause word order requires the finite verb to be in second position, so:

• Das Trinken von Wasser ist wichtig. ✅

You can move wichtig to the front for emphasis, but then the verb must still stay second:

• Wichtig ist das Trinken von Wasser. ✅

So wichtig can come first, but only if ist immediately follows it.

Because when German turns a verb into a noun, it is normally neuter, so the article is das.

This is a very useful pattern:

• essen → das Essen
• lesen → das Lesen
• trinken → das Trinken

So if you see an infinitive used as a noun, das is usually what you should expect.

It is natural and correct, but it sounds a little more formal or abstract than everyday speech.

For example:

• Das Trinken von Wasser ist wichtig. = correct, somewhat formal
• Wasser trinken ist wichtig. = also correct, more everyday and straightforward

So yes, the sentence is fine, but many speakers would probably choose Wasser trinken ist wichtig in casual conversation.