A encanadora vai resolver o vazamento amanhã.

A is the feminine singular definite article, meaning the.

So:

• a encanadora = the plumber (female)

Portuguese uses definite articles more often than English does. In this sentence, a shows that we are talking about a specific plumber, not just any plumber.

Because encanadora is the feminine form of the noun.

• encanador = male plumber
• encanadora = female plumber

This sentence specifically refers to a woman, so Portuguese uses the feminine form.

This is very common with professions and people words in Portuguese:

• professor / professora
• advogado / advogada
• cantor / cantora

Yes. Vai resolver is a very common way to talk about the future in Brazilian Portuguese.

It is built like this:

• vai = goes / is going
• resolver = to fix / to solve / to resolve

Together, vai resolver means is going to fix or simply will fix.

This structure is:

• ir in the present tense + infinitive

Examples:

• Eu vou ligar = I’m going to call / I will call
• Ela vai chegar = She’s going to arrive / She will arrive

In everyday Brazilian Portuguese, this is often more common than the simple future.

Yes. You could say:

• A encanadora resolverá o vazamento amanhã.

This is correct, but it sounds more formal, more written, or less conversational than vai resolver.

In everyday spoken Brazilian Portuguese, vai resolver is usually the more natural choice.

Because vai is the correct form of the verb ir for ela / você / a encanadora.

The subject a encanadora is third person singular, so the verb must also be third person singular.

Present tense of ir:

• eu vou
• você / ele / ela vai
• nós vamos
• vocês / eles / elas vão

So:

• A encanadora vai... is correct because a encanadora = she grammatically.

Literally, resolver often means to solve or to resolve. But in everyday Portuguese, it can also mean to take care of, to deal with, or to fix, depending on the context.

Here:

• resolver o vazamento = fix the leak / deal with the leak

Portuguese often uses broader verbs where English prefers a more specific one.

O is the masculine singular definite article, meaning the.

• o vazamento = the leak

Again, Portuguese often uses articles where English might or might not use them. Here it sounds natural because it refers to a specific leak already known in the situation.

Also, vazamento is a masculine noun, so it takes o, not a.

You usually learn the noun together with its article:

• o vazamento

That tells you it is masculine.

A lot of Portuguese nouns ending in -o are masculine, but vazamento actually ends in -mento, and nouns ending in -mento are very commonly masculine:

• o apartamento
• o documento
• o pagamento
• o vazamento

As always, it is safest to memorize nouns with their article.

No, it does not have to be at the end. Amanhã is flexible.

These are all natural:

• A encanadora vai resolver o vazamento amanhã.
• Amanhã, a encanadora vai resolver o vazamento.
• A encanadora amanhã vai resolver o vazamento.
  (possible, though less neutral in many contexts)

Putting amanhã at the end is very common and neutral.

The main visible gender marking here is in the noun phrase:

• a encanadora

The article a and the noun ending -a both show feminine singular.

But the verb vai does not change for gender. Portuguese verbs agree with the subject in person and number, not in masculine/feminine gender.

So:

• A encanadora vai
• O encanador vai

Both use vai.

Normally, no. In standard Portuguese, you would usually keep the article:

• A encanadora vai resolver o vazamento amanhã.

Dropping the article would sound incomplete in most normal contexts.

Portuguese generally requires an article before a common noun used as the subject when it means the plumber.

A helpful approximate pronunciation is:

• en-kah-nah-DOH-rah

A few notes:

• the stress is on do
• the r at the end in Brazilian Portuguese is often softer than an English r, and in some accents it may sound like an h-like sound
• the en at the start is nasalized slightly

You do not need a perfect accent right away, but the stress on do is important.

Yes, encanador / encanadora is a very common everyday word in Brazil.

You may also hear terms related to plumbing work, such as bombeiro hidráulico in some regions or contexts, but encanador(a) is the straightforward, common word most learners should know first.

Portuguese can use present continuous forms, but in this sentence the idea is future, not an action happening right now.

So Brazilian Portuguese naturally uses:

• vai resolver = going to fix / will fix

If you said:

• A encanadora está resolvendo o vazamento amanhã

that would sound odd in most contexts, because está resolvendo usually means the action is in progress now.

For planned future actions, vai + infinitive is much more natural.

Yes. The sentence would still clearly refer to the future:

• A encanadora vai resolver o vazamento.

That means The plumber is going to fix the leak or will fix the leak.

Adding amanhã just gives a specific time:

• tomorrow

So vai resolver shows future, and amanhã makes that future more precise.