This contains the following:
- Processor unit for combi boiler (434000) - these are non-pumped.
- The quartz control unit that switches on and off and controls temperature. Note that these have a boost button which doesn’t do anything on the combi processors.
- Backplate to attach the control unit.
- Cable to connect the processor and controller.

This is all fully functional having been used daily. We are having a new bath installed and going back to a traditional tap system.