The DW are self-priming, centrifugal pumps powered by high quality diesel engines. They have carbon ceramic mechanical seals and lightweight, aluminium pump housings, to assist portability. For increased abrasion resistance, they have cast iron volutes and impellers, for the pumping of clear and dirty water. All models are housed within a protective tubular steel, easy carry frame which has anti-vibration mounts fitted. Maximum suction lift is 7 meters, however 6 meters, or less, is recommended. Hose couplings, washers, clips and strainers are supplied with all pumps, but hoses are extra.