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A modular, heavy-duty fluid transfer system pairing our flagship positive displacement pumphead with an industrial-grade US-Made Baldor motor.
- The Pumphead: Monster GSM25 cast-iron positive displacement pumphead with helical-cut steel gears (25 GPM). Self-priming.
- The Motor: Custom US-Made Baldor Motor (3/4hp, 3450 RPM, 120/230V 60HZ).
- Drive System: Includes three-piece shaft coupler with rubber element.
- Out of the Box: Pre-wired with heavy-duty switch and power cord. Includes carry handle.
The ultimate heavy-duty transfer system. We pair our flagship cast-iron positive displacement pumphead with an industrial-grade US-made Baldor motor for fast, open-ended transfer of light to heavy viscosity oils at a reliable 25 GPM.
Engineered to provide a truly robust, high-volume transfer solution, the Monster Transfer Series is built modularly. By combining a dedicated, heavy-duty fluid pumphead with an industrial-grade electric motor, we've created a self-priming, continuous-duty system built to excel in demanding environments and optimized for specific fluid applications.
The Heart + The Muscle (Our Modular Philosophy)
Our pumps are designed as true fluid transfer systems by pairing a specialized pumphead (The Heart) with a powerful electric motor (The Muscle). This allows us to create the perfect tool tailored for your specific viscosity and application needs.
Component 1: The Monster GSM25 Pumphead
At the heart of the system is the GSM25—a direct-drive, cast-iron positive displacement gear pumphead. It utilizes large displacement, helical-cut steel gears for incredibly fast, quiet, and pulseless fluid transfer. It is inherently self-priming, relies on the fluid you pump for internal lubrication, and features high-temp Viton seals.
Component 2: The Electric Motor
Because moving thicker fluids efficiently requires substantial torque, we match the pumphead with a power plant built to handle the load. This unit features a Custom US-Made Baldor Motor engineered specifically for Goldstream. It comes pre-wired with a heavy-duty switch and power cord, meaning it is ready to pump right out of the box.
Motor Specifications
| Motor Feature | Specification |
|---|---|
| Part Number | 34N655S944G1* |
| Horsepower | 3/4hp |
| Operating Speed | 3450 RPM |
| Voltage | 120/230V 60HZ |
| Wiring / Controls | 3p reversible switch w/cord and NEMA Plug (USA) |
| Frame Size | NEMA 56C |
System Performance Specifications
- System Flow Rate: 25 GPM
- Pump Design: Positive Displacement Gear Pump
- Self-Priming: Yes
- Port Size: 1" NPT Inlet / Outlet
What’s Included in the Box
- GSM25 Cast-Iron Gear Pumphead
- US-Made Baldor Electric Motor (3/4hp)
- Three-piece shaft coupler with rubber element
- Heavy-Duty Carry Handle
- Two (2) 1" NPT to 1.25" Hose Barbs
Note: Hoses and wands are sold separately. This unit is intended for oil-based fluids only; do not pump water or gasoline.
FAQs
Product & Usage
1. Are Goldstream pumps built for professional use?
Yes. Every Monster Series and Industrial Series pump is built for continuous duty, marine environments, and the kind of fluid-transfer work that breaks cheaper pumps.
2. Can I use a Goldstream pump for my home project?
Absolutely. Our Monster Series is portable and self-priming — no tuning or tricks needed. Plug it in and move fluid.
3. Can Goldstream pumps be used in marine or outdoor conditions?
Yes. Goldstream pumps are tested in real-world marine, biofuel, and industrial conditions — heat, humidity, and long runtimes.
Maintenance & Accessories
1. What maintenance does a Goldstream pump need?
Flush with a compatible fluid after each use and keep seals clean. That's it — our gear pumps are built to run with minimal fuss.
2. Can I buy replacement parts?
Yes. Seals, impellers, gaskets, and full rebuild kits are in stock at the Pump Parts collection.
3. Do you provide installation guides?
Every pump ships with a printed install guide. Digital copies and install videos are linked from each product page.
Warranty & Guarantee
1. Do Goldstream pumps come with a warranty?
Every Goldstream pump is backed by our 1-year limited warranty against defects in materials and workmanship, when used with approved oil-based fluids.
2. How do I register my pump for warranty coverage?
Keep your order confirmation email — it acts as proof of purchase. You can also register your serial number in your account for faster service.
3. What does the warranty cover?
Defects in materials and workmanship under normal use — no fine print, no games. Wear items (seals, gaskets) are covered by a separate 1-year warranty.
4. What if my pump fails?
Call us. We'll get you a replacement or rebuild fast — usually the same week.
Purchasing & Support
1. How fast is shipping and delivery?
Most orders ship same-day from Charleston, SC, with delivery in 2–5 business days anywhere in the continental US.
2. Do you offer bulk or corporate purchasing options?
Yes. Goldstream offers dealer and fleet pricing — call us at (843) 972-4211 or use the contact form.
3. How can I reach a real technician?
Call (843) 972-4211 Mon–Fri, 8am–3pm EST, or email support@goldstreampumps.com. No call centers.
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