Strainers are available in NH & NPSH threads, storz and camlock. We carry a full line of barrel, basket, low level, self leveling floating and box strainers. Sizes range from 1 1/2 to 6 inches. A strainer is a device attached to the end of a suction hose that prevents debris from entering the hose or the pump when drawing water from a pond or other water source. Materials are aluminum, steel and plastic. Some models incorporate an eyelet to allow a retrieval line to be attached.