Descalcificamos, ya que hay cal en el circuito de agua.

Descalcificamos is the 1st person plural present indicative form of descalcificar.

So it literally means we descale / we remove limescale.

In Spanish, the present tense often covers both:

• we descale
• we are descaling

The exact English translation depends on context.

Descalcificar is a specific verb meaning to descale or to remove limescale/mineral deposits.

You could say quitamos la cal, which means we remove the limescale, but descalcificar sounds more precise and technical, especially in maintenance, appliances, plumbing, or machine instructions.

So:

• descalcificar = the specific process of descaling
• quitar la cal = a more general way to say remove the limescale

Spanish often leaves out subject pronouns because the verb ending already shows who is doing the action.

Here, -amos tells you it is we.

So:

• Descalcificamos = We descale / We are descaling
• Nosotros descalcificamos is also possible, but usually unnecessary unless you want emphasis or contrast.

This is very normal in Spanish.

Ya que means since, because, or given that.

In this sentence, it introduces the reason:

• Descalcificamos, ya que hay cal...
• We descale, since there is limescale...

Compared with porque:

• porque is the most common everyday word for because
• ya que can sound a bit more explanatory, formal, or matter-of-fact

In many contexts, both work:

• Descalcificamos porque hay cal...
• Descalcificamos, ya que hay cal...

Both are correct, but ya que often feels slightly more like since / given that.

Here cal means limescale or mineral deposits, not lime in the fruit sense.

This is a very common word in Spain when talking about:

• hard water
• kettles
• coffee machines
• pipes
• boilers
• water systems

So in this context:

• hay cal = there is limescale

It does not mean chalk here, even though in other contexts cal can refer to lime-related substances in construction or chemistry.

Hay means there is / there are, so it is used to say that something exists or is present.

• hay cal = there is limescale

You do not use estar or ser here because the sentence is not identifying or describing cal; it is saying that limescale is present in the system.

Compare:

• Hay cal en el circuito. = There is limescale in the circuit.
• La cal está en el circuito. = The limescale is in the circuit.
  This is possible, but it sounds more specific, as if you are referring to known limescale already mentioned before.

So hay is the natural choice when introducing the existence of it.

After hay, Spanish usually uses no definite article when talking about the existence of something in a general way.

So:

• hay cal = there is limescale
• hay agua = there is water
• hay un problema = there is a problem

Hay la cal is not correct here.

If you use la cal, you are referring to a specific, already identified limescale deposit:

• La cal está en el circuito = The limescale is in the circuit

But this sentence is simply stating that limescale is present, so hay cal is the right form.

It means in the water circuit or in the water system/pathway.

Breakdown:

• en = in
• el circuito = the circuit/system
• de agua = of water / water

In practical English, depending on context, this could refer to:

• the water circuit
• the water system
• the water line
• the internal water pathway of a machine

In Spanish technical language, circuito de agua is a normal way to talk about the part of a machine or installation through which water circulates.

The comma separates the main statement from the explanatory reason that follows.

Structure:

• Descalcificamos,
• ya que hay cal en el circuito de agua.

This comma is very natural in Spanish when ya que introduces an explanation or justification.

You may also see sentences without a comma in other contexts, but here the comma helps signal:

• first, the action
• then, the reason

So it reads a bit like:

• We are descaling, since there is limescale in the water circuit.

It is understandable as everyday Spanish, but it has a somewhat technical or maintenance-related tone because of words like:

• descalcificamos
• cal
• circuito de agua

You might hear or read this in:

• appliance manuals
• machine maintenance instructions
• repair reports
• customer service explanations
• plumbing or technical contexts

In more casual speech, someone might say something simpler, such as:

• Quitamos la cal porque la máquina tiene cal por dentro.
• Hay que descalcificar porque tiene cal.

So the original sentence sounds natural, but fairly functional and technical.

Yes. The Spanish present tense can express different ideas depending on context, including:

• an action happening now
  Descalcificamos... = We are descaling...

• a habitual action
  Descalcificamos la máquina cada mes. = We descale the machine every month.

• a general procedure or standard practice
  Descalcificamos cuando hay cal en el circuito. = We descale when there is limescale in the circuit.

So without more context, descalcificamos could mean:

• we are descaling
• we descale
• we descale as a procedure

That depends on who is doing the action.

Examples:

• Descalcifico, ya que hay cal en el circuito de agua. = I descale / I am descaling...
• Descalcifica, ya que hay cal en el circuito de agua. = He/She descales...
• Descalcifica, ya que hay cal en el circuito de agua. = Descale... (command to usted)
• Descalcificamos, ya que hay cal... = We descale...

So the original sentence specifically uses the we form.