The DuroMax XP904WP portable water pump is a 4-inch gasoline engine water pump built for moving large volumes of water in a hurry. This is a portable water pump designed for high-volume water transfer, draining, and flood cleanup. Model Number: XP904WP. With a 270cc 4-stroke engine, 427 GPM maximum flow rate, and 98-foot maximum overhead lift, this pump is aimed at property owners, contractors, farmers, and crews who need more capacity than a small utility pump can deliver.

Where this pump earns its keep is volume. A 4-inch inlet and discharge setup paired with a 3600 RPM max output gives the DuroMax XP904WP portable water pump the ability to move water quickly for jobs like draining pools, clearing flooded trenches, emptying storage tanks, or irrigating fields. If you are dealing with standing water and time matters, flow rate is the spec that changes the job, and 427 gallons per minute puts this unit in the heavy-moving category.

The engine side is set up the way most buyers in this category want it: gasoline power, recoil start, OHV valve design, and forced-air cooling. DuroMax also calls out a cast iron sleeve, stainless steel ball bearing, and splash oil cooling. Those details matter because portable pumps tend to get used in dirty, wet, stop-and-go conditions. A tougher internal build helps with long-term durability, especially when the pump is used seasonally and then called back into service during storms, drainage work, or emergency cleanup.

On the pump end, the XP904WP uses 4-inch inlet and discharge connections and NPT threads for hose hookup. That makes it easier to match the pump with the right suction and discharge accessories when you are setting up for transfer work. The unit also includes a priming port, threaded hose connectors, threaded hose clamps, and an intake hose-end strainer. That gives you the basic hardware to get the pump configured, though the suction and discharge hoses themselves are sold separately.

From a practical jobsite standpoint, the full frame design is doing real work here. At 110 pounds, this is not a grab-it-with-one-hand pump, but the protective tubular frame helps with transport, storage, and keeping the engine and pump body protected when it is riding in a truck bed or getting moved around a work area. The 28-inch by 22-inch by 22-inch footprint is compact enough for a high-capacity pump in this class, while still giving it the stable stance you want on uneven ground.

The fuel and maintenance side is straightforward. The 1.7-gallon fuel tank supports gasoline operation, and the engine uses 15W-40 oil with a 37.1 fluid ounce oil capacity. Automatic low oil shutdown is one of those features you hope you never need, but it can save the engine if someone forgets to check oil before startup. That matters more on emergency equipment than people like to admit.

As a water transfer and semi-trash style pump, this model fits best where fast movement of water is the goal. It is a strong match for flooded areas, trench dewatering, draining pools or ponds, tank filling and emptying, and irrigation support. It is less about finesse and more about getting a lot of water from point A to point B with a gas-powered unit that does not depend on utility power.

If you are a homeowner dealing with occasional drainage jobs, this may be more pump than you need. But if you want serious output for flood response, property maintenance, construction cleanup, agricultural water transfer, or general contractor work, the DuroMax XP904WP portable water pump makes sense. It is built for buyers who care about flow, connection size, and engine durability first.

DuroMax XP904WP portable water pump is for the guy who needs volume, not excuses

If your main concern is moving a lot of water fast, this pump brings the right numbers and the right connection size to the job.

• Who it's for: Property owners, contractors, agricultural users, and cleanup crews dealing with flood water, trench drainage, tank transfer, or pool draining.
• Why it stands out: The 427 GPM output, 4-inch ports, 270cc gas engine, and durable engine features make it a legit high-capacity portable pump instead of a light-duty homeowner special.
• Worth knowing: It is a 110-pound gas unit, so plan on real hoses and real setup. Also, suction and discharge hoses are not included.

• What kind of engine does this pump use? It uses a 270cc 4-stroke OHV gasoline engine with recoil start and forced-air cooling.
• What size hose connections does it use? The pump has 4-inch inlet and discharge connections and uses NPT threads.
• How much water can it move? The maximum flow rate is 427 gallons per minute.
• Does it have engine protection? Yes. It includes automatic low oil shutdown.