Monster 25 GPM Bare Pump - 1hp, 120/230V 60HZ

The Monster 25 GPM Bare Pump in 1HP is the mid-power configuration of the GSM25 pumphead line — more torque than the 3/4HP portable motor, in a bare assembly format built for hardwiring into a skid, control panel, or custom installation. At 25 GPM, it moves serious volume. At 1HP, it handles heavier viscosity loads than the 3/4HP portable without stepping up to the 2HP bare pump.

The GSM25 is a larger displacement pumphead than the GSM13 used in the 12 and 15 GPM units — it moves more fluid per revolution, which is why it reaches 25 GPM even at the same shaft speed. The 1HP Baldor motor provides additional torque headroom over the 3/4HP portable motor, making this configuration better suited for thicker fluids or longer run cycles where the motor needs to sustain load without thermal stress. Ships bare — no handle, no switch, no plug.

Bare Pump — No Handle, No Wiring

This unit ships without a carry handle, switch, or pre-wired cord. It is intended for permanent or semi-permanent installation where you will provide your own mounting, wiring, and controls. If you need a ready-to-run portable unit, see the Monster 25 GPM Portable Pump (W2066).

The GSM25 Pumphead

The GSM25 is a direct-drive, cast-iron positive displacement gear pumphead with helical-cut steel gears. Larger displacement than the GSM13 — moves more fluid per revolution for higher flow at equivalent shaft speeds. Self-priming, pulseless, and quiet. Viton seals for compatibility with vegetable oils, motor oils, gear oils, and light to medium viscosity fluids.

The Motor

US-Made Baldor industrial motor, 1HP, 3450 RPM, 120/230V 60HZ, NEMA 56C frame. Ships bare — no switch, no cord, no handle.

Specifications

• SKU: W2080
• Pumphead: GSM25 Cast-Iron Positive Displacement Gear Pump
• Motor Speed: 3450 RPM
• Flow Rate: 25 GPM
• Self-Priming: Yes
• Port Size: 1" NPT Inlet / Outlet
• Seals: Viton (high-temp)
• Motor: 1 HP, 120/230V 60HZ, NEMA 56C
• Handle: Not included (bare pump)
• Wiring: Not included — requires hardwiring
• Viscosity: Light to medium viscosity oils

What's in the Box

• GSM25 Cast-Iron Gear Pumphead
• US-Made Baldor Motor (1 HP, 120/230V 60HZ)
• Three-piece shaft coupler with rubber element
• Two (2) 1" NPT Hose Barbs

Note: Hoses, wands, switches, and mounting hardware are sold separately. Requires hardwiring into 120V or 230V single-phase power source.