Suction diffusers are installed at the suction side of a pump in either a horizontal or vertical position. It is designed to remove any foreign matter or impurities that may be hazardous to the pump or other system components, which may also affect their performance, while providing proper flow conditions to the pump. Suction diffuser has integral straightening vane to ensure uniform flow to the suction inlet of the pump and provides minimal pressure drop with its oversized body and screen. Suction Diffusers incorporate the functions of a strainer, flow straightener, elbow and pipe reducer in one compact unit thereby reducing installation costs.