The workflow follows the development of a 3D printable ‘toolkit’ of common fittings and connectors required for constructing basic flow chemistry configurations. In this work, we present an easy to follow design workflow for minimising the complexity of this design optimization process. Designing functional flow components can often be a lengthy and laborious process requiring complex 3D modelling and multiple design iterations. As 3D printing technologies become more accessible, chemists are beginning to design and develop their own bespoke printable devices particularly applied to the field of flow chemistry.