A system attachable to a refrigeration circuit, the system including a pump assembly attachable to the refrigeration circuit, the pump assembly including a pump, and an accessory attachable to the refrigeration circuit concurrently with the pump assembly. Where the pump assembly is configured to receive the first signal from the accessory via a first wireless communication interface, and where the pump assembly is operable in a fluid removal state, in which the pump removes a fluid from the refrigeration circuit when the electric motor is activated, and in a fluid supply state, in which refrigerant is supplied to the refrigeration circuit.