We are not here to slate hire machines but the truth is they are not as powerful or as efficient in rinsing out your carpet as our machinery. The vacuum motors are less powerful than the type used in our modern, state of the art cleaning machines. As a result of poor vacuum performance in comparison, the water pressure used to agitate and rinse the carpet fibres is less than our modern machines, if the pump was more powerful you would be left with a wet carpet if the hire machine had better rinsing and a more powerful pump.