The disclosure described herein relates to waterway assemblies and manifolds for waterway assemblies for use in water fixtures such as, for example, faucets. Examples of the manifold for a waterway assembly of the present disclosure include an insert with a pair of inlet tubes which are offset from a supply tube. A method of manufacture for the waterway assembly and manifold having the insert with a pair of inlet tubes which are offset from a supply tube is also provided herein.