Can I add the same product to the cart with different configurations?

Yes, you can add the same product to the cart with different configurations. Each combination of rotation and orientation is treated as a separate item in the cart. For example, if you need the same pump in two variants (one with right rotation and one with left rotation), you can order them in a single solution without having to make several separate orders.

To manage the quantities of the products in the cart, read How do I change the quantity of a product in the cart? For an overview of configurable products, read What does it mean that a product needs to be configured?