Linearly, along its own length.

Add users by adding length and outlets.

A circular fountain grows by diameter.

Which soon dominates the room.

For large numbers only this keeps scaling.

Where people arrive in a line.

At the entrance to a production area.

Or a clean room, at shift change.

Everyone moving the same direction.

A fountain suits a crowd converging instead.

Being fabricated as a single piece.

Radiused internal corners, no joints.

A fall to one waste point.

And a splashback formed with the bowl.

Not a row of basins in a shared housing.

The number of outlets, not the length.

A long trough with few outlets is slow.

It looks generous and performs poorly.

Count outlets against peak demand.

Then choose a length to suit them.

Sensor or knee operation, per position.

So hands never touch anything.

Which is the point in a food area.

Timed flow stops taps being left running.

Specify per outlet, not per trough.

One is usual, and it wants a fall.

The trough is graded towards it.

So nothing stands in the bowl.

Standing water in a handwash trough.

Defeats what it is there for.

Usually, where hygiene governs.

Fabricated rather than moulded.

Solid surface versions exist.

Chosen where appearance matters more.

Match the material to the regime.