Ultra S are a range of WRAS Approved Stainless Steel Multistage pumps for the pumping of clean water, with the ability to handle liquid temperature from -15 to +110ºC. Complete with stainless steel impeller, diffusers and pump body, they can produce high flow and pressure in performance. They are not self priming and should not be allowed to run dry, to be used with clean water only with no solids or abrasives.