CWZ series horizontal centrifugal self-priming marine pumps are well fixed and beautifully shaped and have high self-priming function. They can also be installed and used easily which are best choices for the ships to drain water. CWZ series pumps are well used in all kinds of ships and warships for ballast, fire control, life water supply on the bilge. They can be used to pump sea water and fresh water, but the mediums' temperature should be lower than 80 centigrade.