Compact DC Diaphragm Water Pump — 310 electronic starter, B Type, 27mm A compact, lowpower diaphragm water pump designed for reliable smallscale water transfer and fluid handling. The pump accepts DC input at 3.0V, 3.7V or 4.2V, runs at a rated power of 2.5W, and uses an electronic starter for smooth startup and stable operation. Its 27mm B Type form factor makes it suitable for tight installations and portable systems. Key benefits Lowvoltage operation: Works with common DC sources (3V, 3.7V, 4.2V), enabling use with small batteries and lowvoltage power supplies. Energyefficient: Rated 2.5W power consumption for extended run time on compact power sources. Smooth, reliable start: Electronic starter improves startup consistency and reduces hesitation at low voltages. Spacesaving size: 27mm B Type form factor fits into compact assemblies and retrofit applications. Main features and attributes Model and type: 310 electronic starter diaphragm water pump, B Type. Voltage compatibility: DC 3V, 3.7V, 4.2V. Rated power: 2.5W. Pump technology: Diaphragm pump — positive displacement action suitable for handling clean water and other compatible liquids where diaphragmtype operation is desired. Physical form: 27mm B Type compact housing for small installations. Why customers choose this pump Ideal where low input voltage and compact size are priorities. Electronic starter ensures dependable operation across the supported voltage range. Diaphragm design provides consistent pumping action without needing complex priming for many lightduty applications. Typical applications Portable water dispensers and mini watercirculation systems powered by small batteries (3.7V Liion cells or 3V packs). Smallscale hobby and DIY projects such as model cooling circuits, miniature fountains, or camping water kits. Lowpower automated fluid handling in instrumentation, small garden/microirrigation systems, or prototype devices where space is limited. Installation and compatibility notes Use with DC power sources in the specified voltage range (3.0V, 3.7V, 4.2V) to ensure proper operation and longevity. Observe correct polarity when connecting to the DC supply. Confirm liquid compatibility with diaphragm pump design before continuous exposure to aggressive chemicals or temperature fluids. The B Type 27mm form factor is intended for compact mounting; verify dimensions and mounting points against your application. What is included / model identification Product identified as: DC 3V 3.7V 4.2V 2.5W 310 electronic starter Diaphragm Water Pump 27mm B Type Pump. For projects and systems that require a reliable, lowvoltage diaphragm pump with a compact footprint and electronic starter functionality, this 310 B Type 27mm pump offers a straightforward, energyefficient solution.