MP Pumps Flomax self-priming pumps come in 1-1/2", 2” and 3” pipe sizes . MP Pumps HHLF high pressure self-priming pumps meet USCG specifications for auxiliary fire control. The high suction center line and impeller design eliminates premature priming loss while ensuring consistent priming capability. 316 Stainless Steel centrifugal pumps, are high performance units ideal for marine, commercial, or industrial transfer application of compatible fluids.