I bought a Breha caravan pump - which was one of the more expensive ones. Unlike the other caravan pumps I have bought in the past, it did not fit the hole in the sink (Millard caravan) and was difficult to install without modification. It is noisy (it has some type of ball-bearing mechanism) and doesn't draw water well. It also has a shorter body than other pumps (which is what the 'short' in the description signifies - now I understand) adding further difficulty to the installation. Also, it took weeks to arrive rather than a few days - glad I ordered well in advance of requirements.