Tsurumi Pump HS2.4S Submersible Trash Pump with Agitator 1/2

The Verdict

Most submersible pumps die a slow, clogged death. The Tsurumi HS2.4S doesn’t just move water — it churns up whatever’s settled at the bottom and sends it through the discharge. That’s the whole point of the integrated agitator, and it’s what separates this pump from the $80 hardware-store specials. If you’ve ever watched a standard pump suck up a few inches of silt before the impeller fouls, you understand why this design matters.

What you actually get

The HS2.4S is a 1/2 HP submersible trash pump with a 2-inch NPT discharge. It moves up to 132 gallons per minute at a 30-foot maximum head — enough to drain a flooded crawlspace or keep a construction pit dry. The agitator sits below the suction intake, spinning at 3,450 RPM to break up mud, sand, and debris into a slurry that the pump can actually pull through.

Construction is what you’d expect from Tsurumi — the Japanese manufacturer that dominates the dewatering market. The housing is cast aluminum, the motor is oil-filled for continuous cooling, and the double silicon carbide mechanical seals protect the motor even if the pump runs dry. It weighs 48 pounds, which tells you this isn’t a flimsy toy.

Real-world performance

The agitator makes the difference. Drop this pump into a muddy ditch or a sump pit with a layer of gravel and silt, and it keeps pulling water while the solids break apart and flow through. The 1.18-inch solids handling capability means it won’t choke on small debris — stones, wood chips, pipe fragments — that would destroy a standard submersible.

Owners consistently highlight the build quality. One contractor noted, “I’ve had mine for 8 years. It’s been dropped, run dry, and abused. Still starts on the first try.” Another mentioned, “The agitator is incredible. My old pump would stall in mud. This one just chews through it.”

It’s not quiet — it’s a commercial pump with a motor that means business. You’ll hear it running, but that’s the sound of something working correctly.

Where it falls short

The 2-inch discharge is the biggest limitation. If you need to move large volumes of clean water quickly, a larger pump with a 3-inch or 4-inch outlet will outperform this. The HS2.4S is designed for dirty water, not flood-response volume.

There’s also no built-in float switch. You’ll need to wire in a separate float control or use it manually. For a permanent sump installation, that’s an extra component to buy and install. And at 48 pounds, it’s not the kind of pump you casually haul around one-handed.

Finally, the price. This is a premium-priced pump. You’re paying for Japanese engineering and the durability that comes with it. If you only need to move water twice a year, a cheaper pump makes sense. If you need something that won’t quit, this is worth the money.

Who should buy this

• Contractors and excavators who deal with muddy, debris-filled water on job sites
• Property managers maintaining retention ponds, drainage ditches, or lift stations
• Farmers and ranchers moving water from dugouts or flooded fields
• Serious hobbyists with problematic basements that fill with silt

Skip it if you just need to empty a hot tub or deal with a one-time basement flood of clean water — rent a pump or buy something cheaper.

FAQ

Q: Can this pump run dry without damage? A: Yes. The double silicon carbide seals allow the pump to run dry for short periods without burning out. It’s not designed for continuous dry operation, but it won’t self-destruct if the water level drops.

Q: Does it come with a float switch or automatic on/off? A: No. The HS2.4S is manual operation only. You can purchase Tsurumi’s separate float switch kit (the FKN-2) and wire it in for automatic operation, but it’s not included.

Q: What size hose or pipe do I need? A: A 2-inch discharge hose or pipe connects to the NPT outlet. Use a heavy-duty suction or discharge hose rated for trash pump use — standard garden hoses won’t handle the flow or pressure.

The Verdict

Buy it if you need a pump that won’t clog on mud, silt, or debris — and you’re willing to pay for commercial-grade reliability. This is a tool, not a toy. It’s built for continuous use and years of abuse.

Skip it if you’re on a tight budget, only pump occasionally, or need high-volume water movement for flood control. The 2-inch discharge and manual operation limit its versatility for casual homeowners.

Rating: 4.6/5 — Deduct half a star for the missing float switch and the premium price. Everything else is exactly what a professional dewatering pump should be. If you need to move dirty water reliably, this is the one to buy.

Where to Buy

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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.