Vodoinstalater dolazi zbog cevi.

Yes. Vodoinstalater is a single word meaning plumber.

It is built from:

• vodo- = related to water
• instalater = installer / technician

So it literally suggests someone who works with water installations, which is why it means plumber.

Because the preposition zbog requires the genitive case.

The basic form is:

• cev = pipe

After zbog, it changes to:

• zbog cevi = because of the pipe / because of the pipes

So this is a case change, not a different word.

Here cevi is in the genitive after zbog.

A very useful rule is:

• zbog + genitive

Examples:

• zbog problema = because of the problem
• zbog kiše = because of the rain
• zbog cevi = because of the pipe / pipes

It can depend on context.

In this sentence, zbog cevi can mean:

• because of the pipe
• because of the pipes

The form does not always make that completely obvious by itself, so the situation usually tells you what is meant. If you are talking about a plumbing problem in a home, English might naturally translate it as because of the pipe or because of the pipes, depending on what is going on.

Zbog usually means because of, due to, or on account of.

In a sentence like this, it often has the practical sense of:

• the plumber is coming because there is an issue with the pipe
• the plumber is coming regarding the pipe
• the plumber is coming to deal with the pipe

So the most direct meaning is because of, but in real-life English the best translation may sound a little more natural as for the pipe problem or about the pipe.

Because Serbian uses the present tense for things that English often expresses with either:

• comes
• is coming

So dolazi can mean:

• comes
• is coming

Context decides which one sounds best in English.

In everyday speech, Serbian present tense can also refer to a near-future event if it is understood from context:

• Vodoinstalater dolazi sutra. = The plumber is coming tomorrow.

Because Serbian does not have articles like English.

So:

• vodoinstalater can mean a plumber or the plumber
• cev / cevi can mean a pipe, the pipe, or sometimes pipes

The exact meaning comes from context, not from a separate article word.

Yes. Serbian word order is more flexible than English word order because cases show the grammatical relationships.

The neutral order here is:

• Vodoinstalater dolazi zbog cevi.

But you could also change the order for emphasis, for example:

• Zbog cevi dolazi vodoinstalater. = It is because of the pipe that the plumber is coming.
• Dolazi vodoinstalater zbog cevi. = The plumber is coming because of the pipe.

These versions are not exactly identical in emphasis, but they are grammatically possible.

A rough pronunciation guide is:

• Vodoinstalater = vo-do-in-sta-LA-ter
• dolazi = do-LA-zi
• zbog = zbog
• cevi = TSE-vi

A few helpful notes:

• c in Serbian is pronounced like ts in cats
• zbog begins with a consonant cluster that English speakers may need to practice slowly: z-bog
• Serbian spelling is very regular, so once you know the sounds, pronunciation becomes much easier

Yes, it is natural.

It sounds like a normal way to say that a plumber is coming because there is some issue involving a pipe. In very natural English, you might translate the idea a bit more freely, such as:

• The plumber is coming about the pipe.
• The plumber is coming because of the pipe problem.

But the Serbian sentence itself is straightforward and idiomatic.