A collection of non-powered, non-sterile devices intended to be integrated within a haemodialysis system to allow for mixing and delivery of dialysate solution from a powered delivery unit (not included) to the dialyser (not included). The set includes mixing chambers to allow the dialysate to be mixed from a concentrate solution, pumping reservoirs designed to be compressed by an actuator(s) within the delivery unit to displace the dialysate, and an array of tubing/connectors; it is intended to be used in the home and healthcare settings. This is a single-use device.