WHALE Inline Booster Premium 12V. Premium In line pump 13 lpm 12 V d.c. Whale electric pump range is manufactured from highest quality in-house moulded parts and robust motors. Compact, quiet lightweight high performance electric impeller pumps fit in line to increase flow rate. Simple, compact and an economical solution Long life, very quiet with low power consumption. An inexpensive way to enhance your water system. lightweight design Straight forward installation ? fits unsupported into pipework.