Drainage channel with or without inlet box?

I want to install a drainage channel in our driveway (new construction) in front of the garage door. I have chosen ACO Drain, 5 meters, with a bottom slope. That is clear.

I am just not sure whether to have it with or without an inlet box. The purpose is clear, it prevents leaves and mud.

But isn’t such a box somewhat oversized for a private driveway? I do want to wash our cars in the driveway, but how much mud would really accumulate?

I need experience-based insights to make a decision.

Thank you.

What is the slope like at your garage, towards the garage or towards the street?

I am of the opinion anyway that the gutters only have an aesthetic aspect; if they are actually supposed to have a benefit, the gutter alone is not enough, then you need an infiltration basin as well.

Originally, the gutters were supposed to prevent water from the driveway running into the street, i.e. infiltrate on the own property. Most people install them "stand alone", then you only prevent the 5 liters that fit into the gutter from running into the street. Or even better connected to the rainwater system...

Slope towards the garage, quite steep even. So a channel definitely makes sense with the amount of rain nowadays. The question is only whether with or without [Einlaufkasten]. That is also not exactly cheap with ACO and therefore the question.

Most people install them "stand alone," which only prevents the 5 liters that fit into the gutter from running onto the street. Or even better connected to the rainwater system...

Why shouldn't the gutter be connected to the rainwater system? Or did I misunderstand you?

Because the driveway must drain onto the property and not into the street area/ stormwater sewer system. The background was/ is probably that car residues.... oil and other fluids do not belong in the stormwater sewer system. How the argument fits with underground garages or with a slope to the garage, I also can't tell you.

These are actually outdated regulations, as vehicles today no longer lose so many operating fluids.

Slope to the garage, quite steep even. So a channel certainly makes sense with the amount of rain these days. The question is only whether with or without an inlet box.

I have to pass on that, it certainly also depends on how much rain falls at once in your region; there is surely a statistic on that.

Well, and what if, like us, you have soil that is not permeable? And it is officially allowed to connect the rainwater to the wastewater transfer shaft?