In a liquid dispensing system having a dispensing module and a manifold or service block, the manifold includes an vertically oriented interactive portion that extends, for example, outwardly from a front side and the dispensing module includes a correspondingly shaped interactive portion configured to engage the manifold so that the dispensing module is automatically aligned. The increased surface area in contact between the module and manifold improves their sealing engagement and heat transfer with one another, reduces leakage, and permits increased operating pressures.