La regadera está junto al pulverizador manual.

Spanish uses estar for location, so when you say where something is physically located, you normally use estar:

• La regadera está junto al pulverizador manual. = The watering can is next to the hand sprayer.

You would not normally use ser here. A common guideline is:

• ser = what something is
• estar = where something is / how something is

So location calls for estar.

Junto a means next to, beside, or right by.

Because a + el contracts into al, junto a el pulverizador manual becomes:

• junto al pulverizador manual

So:

• junto al = next to the

A very common equivalent is:

• al lado del pulverizador manual = next to the hand sprayer

Both are natural.

In Spanish, a + el always becomes al.

So:

• junto a + el pulverizador
• becomes
• junto al pulverizador

This is a standard contraction in Spanish. The other very common contraction is:

• de + el = del

For example:

• al pulverizador
• del pulverizador

One important exception: if el is part of a proper name, you do not contract it. But that does not apply here.

Yes, Spanish usually uses the definite article more often than English does.

So Spanish naturally says:

• La regadera
• el pulverizador manual

where English might just say:

• watering can
• hand sprayer

In a normal descriptive sentence, leaving out the article would usually sound incomplete or unnatural:

• La regadera está junto al pulverizador manual. ✔
• Regadera está junto al pulverizador manual. ✘

Because it is a feminine noun: la regadera.

Many Spanish nouns ending in -a are feminine, and regadera follows that common pattern. That means the article must match:

• la regadera

If you describe it with an adjective, that adjective may also need to match in gender if the adjective changes form:

• la regadera nueva
• la regadera grande

Not every noun ending in -a is feminine, but many are.

In Spanish, adjectives usually come after the noun.

So:

• pulverizador manual = manual sprayer / hand sprayer

This is the normal word order. English often puts adjectives before the noun, but Spanish usually places them after:

• casa grande = big house
• herramienta útil = useful tool
• pulverizador manual = manual sprayer

Putting manual before the noun would sound unusual here.

Yes. Depending on the country and context, regadera can mean different things.

In many contexts, it means watering can. In others, it can also mean shower or showerhead.

So context matters. In a sentence with pulverizador manual, many learners would understand regadera as a gardening or utility item, but the exact meaning can depend on the situation and region.

This is very normal in Spanish: one word can have several everyday meanings.

Yes, it is understandable and natural, especially in a descriptive or technical context.

That said, the exact word can vary by country or by the type of object. Depending on the region, people might also use terms like:

• rociador
• atomizador
• aspersor in some contexts

But pulverizador manual is clear and correct for a manual spraying device.

Yes. That is a very natural alternative.

Compare:

• La regadera está junto al pulverizador manual.
• La regadera está al lado del pulverizador manual.

Both mean basically the same thing: The watering can is next to the hand sprayer.

A small grammar note:

• junto a + el = junto al
• al lado de + el = al lado del

So del appears in the second version because de + el = del.

Está has a written accent because the stress falls on the final syllable:

• es-TÁ

The accent mark shows the correct stress and also helps distinguish it from esta, which can mean this (feminine) in some contexts:

• esta regadera = this watering can
• está junto al... = is next to...

So the accent is important both for pronunciation and meaning.

Not in this sentence.

Although junto can be related to the idea of closeness or togetherness, junto a is a fixed expression meaning:

• next to
• beside

So here:

• junto al pulverizador manual = next to the hand sprayer

If you translate junto as together here, it will sound wrong in English. It is better to learn junto a as a phrase.