What happens if I don't complete the configuration?

If you don't complete the configuration of a configurable product (by selecting all the required parameters such as rotation and orientation for vane pumps), the "Add to cart" button remains disabled. Instead, the "Configure" button remains visible, but will not be clickable until the configuration is complete.

To complete the purchase you will have to select all the required parameters in the drop-down menus on the product page: only when the configuration is complete will the "Add to cart" button become active.

To understand in general what configurable products are, read What does it mean that a product needs to be configured? To understand how to select rotation and orientation, read How do I choose the rotation and orientation of a vane pump?