Hydroman® 150TJQ18.5-50H6B Submersible Sludge Pump
If you're dealing with thick sludge, sediment-laden wastewater, or abrasive solids that keep clogging your existing equipment, you need a pump built for exactly that fight. The Hydroman® 150TJQ18.5-50H6B is a heavy duty electric submersible sludge pump engineered to move sludge, sewage, sediment, and industrial slurry without the constant downtime that lighter-duty pumps struggle with. With a 150 mm discharge, 200 m³/h capacity, 12 m head, an 18.5 kW motor, and a 56 mm solid passage, it's built to sit inside your sump, tank, or pit and simply keep working.
This page walks you through what the 150TJQ18.5-50H6B does, how it's built, where it fits in your process, and what you need to know before you buy — or before you replace one that's already worn out.
Why This Pump Earns Its "Heavy Duty" Label
200 m³/h of continuous handling capacity. You're not choosing this pump for light-duty transfer work. At 200 m³/h, it's sized for continuous sludge removal from tanks, sumps, and collection pits where flow can't afford to stall.
A 150 mm discharge that keeps flow moving. A larger discharge diameter matters more than most buyers realize — undersized piping is one of the most common causes of clogging and premature wear in sludge service, because it forces velocity and turbulence up in exactly the spots where solids like to settle or snag. The 150 mm outlet on this model is sized to move a heavier medium without choking the line.
A 56 mm solid passage — the real headline feature. This is where the 150TJQ18.5-50H6B separates itself from a standard submersible pump for sludge. A 56 mm solid passage means it can pass rags, grit, and larger debris that would jam a smaller-throat pump, which directly translates into fewer callouts and less time spent pulling the unit to clear a blockage. If your sludge stream carries stringy material or larger particulates, this is the number to pay attention to.
An 18.5 kW motor built for continuous duty. This isn't a motor sized for intermittent use. It's rated for the kind of extended, round-the-clock operation that municipal and industrial sludge handling actually demands.
Low-speed 980 rpm operation. Running at 980 rpm keeps hydraulic conditions gentler than a high-speed alternative, which is generally favorable for handling abrasive or solids-heavy media — lower peripheral velocity tends to be easier on wetted components over time. That said, actual wear life always depends on your specific solids content, particle hardness, and duty cycle, so treat this as a design advantage rather than a guaranteed lifespan number.
150TJQ18.5-50H6B at a Glance
| Parameter | Specification |
| Pump Model | 150TJQ18.5-50H6B |
| Pump Type | Submersible Sludge Pump |
| Discharge Diameter | 150 mm (6") |
| Capacity | Up to 200 m³/h |
| Head | 12 m |
| Motor Power | 18.5 kW (approx. 24 HP) |
| Speed | 980 rpm |
| Maximum Solid Passage | 56 mm |
| Drive Type | Electric submersible motor |
| Installation | Vertical, fully submerged |
| Typical Application | Sludge, sewage, sediment, wastewater |
A quick note on the horsepower figure, since it comes up in a lot of searches: 18.5 kW converts to roughly 24.8 HP, so you'll sometimes see this pump referred to as a 24 HP submersible sludge pump. The nameplate rating is 18.5 kW — worth keeping in mind if you're cross-checking specs against a datasheet or an electrical permit.
You install the 150TJQ18.5-50H6B directly inside the sludge tank, sump, pit, or wastewater chamber — no separate dry pump station required. Sludge enters through the pump inlet at the base of the unit. The submersible motor drives the impeller, which converts that mechanical energy into centrifugal flow, and the mixture is pushed out through the 150 mm discharge into your downstream pipeline. Because the whole assembly is submerged, you avoid the priming issues and cavitation risk that come with dry-mounted pumps trying to draw sludge from above.
Where You'd Use the 150TJQ18.5-50H6B
Municipal wastewater and sewage. This is a natural fit as a submersible sewage sludge pump in treatment plants — sludge collection tanks, sludge transfer stations, and sewage treatment systems all lean on this kind of continuous, high-solids-passage duty.
Industrial sludge transfer. Process sludge, sediment-heavy industrial wastewater, sludge pits, and settling tanks all fall inside this pump's working range.
Sediment and settled solids removal. The 56 mm solid passage is particularly valuable here, since settled sludge often carries larger particulates than what circulates in the main flow.
Construction and excavation dewatering. Job sites generating muddy, sediment-laden water benefit from the same solids tolerance that makes this pump work in a treatment plant.
Mining and mineral processing. Slurry and sediment byproducts from mineral processing can also be handled by this configuration, though as with any abrasive-slurry application, you should confirm wear-part material compatibility with your Hydroman contact before committing to a duty point.
What It's Rated to Move
You can expect the 150TJQ18.5-50H6B to handle thick sludge, sewage sludge, sediment-laden water, wastewater, muddy water, sludge mixtures containing solid particles, and industrial process wastewater. That's a broad range on paper, but final pump selection should always be based on your actual sludge concentration, solids characteristics, temperature, specific gravity, pipeline layout, and required operating point — not just a general application category.
For reference, the U.S. Environmental Protection Agency notes that municipal sludges of up to roughly 20 percent solids can generally still be conveyed by pump, while primary and combined sludges more typically run in the 2.5–10 percent solids range depending on whether they've been thickened. That's a useful sanity check when you're specifying a pump: the more concentrated your sludge, the more viscosity and abrasion resistance start to matter, and that's exactly the conversation worth having with a pump engineer before you finalize an order.
Submersible Sludge Pump vs. Other Sludge Pump Types
There's more than one way to move sludge, and it helps to know where a submersible pump fits among the different sludge pump types before you specify one.
| Pump Type | Installation | Typical Use |
| Submersible sludge pump | Directly submerged in the medium | Sludge pits, tanks, sumps |
| Dry-installed sludge pump | Mounted outside the tank | Fixed pumping stations |
| Sewage pump | Submerged | Sewage and wastewater |
| Slurry pump | Wet or dry installation | Abrasive slurry |
| Vertical sludge pump | Vertical installation | Open tanks and sumps |
If your application needs a pump running directly inside a sludge pit or collection tank, an electric submersible sludge pump like the 150TJQ18.5-50H6B usually simplifies the installation and removes the need for a separate dry pump station and its associated piping and civil work.
How to Choose the Right Submersible Sludge Pump
Picking a pump on capacity alone is how most oversizing and undersizing mistakes happen. Here's the order you should actually work through:
Get these six factors right and you'll avoid the majority of premature-wear and clogging complaints that show up in sludge pump service.
Installation
Inspect the pump body and power cable before you lower it into position. Set the pump securely inside the sump or sludge tank, connect the 150 mm discharge pipeline, and install the valves and fittings your system calls for. Keep the pump fully submerged throughout operation — running a submersible pump partially dry, even briefly, is one of the fastest ways to damage the motor and seal. Wire the electrical connection to match the motor's rated voltage and phase, verify rotation direction before you run it continuously, and once it's started, check flow, head, vibration, and current draw against the pump curve before you walk away.
A little routine attention goes a long way with sludge duty. Check the impeller periodically for wear, blockage, damage, or excessive clearance. Inspect the mechanical seal for leakage or unusual wear patterns — seal failure is one of the most common reasons a submersible sludge pump gets pulled early. Look over the power cable for cuts, abrasion, insulation damage, or loose connections, and clear any solids or debris buildup, especially if you're running the pump in a higher-solids application. Finally, keep an eye on motor operating conditions — current, voltage, temperature, vibration, and noise — since a shift in any of these is often your earliest warning sign of a developing problem, well before the pump actually fails.
Looking for a 150 mm submersible sludge pump for sale that can actually keep up with continuous, solids-heavy duty? The Hydroman® 150TJQ18.5-50H6B delivers 200 m³/h flow, 12 m head, a 56 mm solid passage, and an 18.5 kW electric motor in a single submersible unit. Before you request a price, it helps to have your flow, head, medium characteristics, and voltage requirements on hand — that's what lets Hydroman quote you an accurate price for the submersible sludge pump you actually need, rather than a generic number that changes once your application details come in. Reach out to Hydroman for pricing, configuration options, delivery timelines, and application-specific recommendations.
If your current unit is showing reduced flow, insufficient head, excessive vibration, frequent clogging, motor overheating, mechanical seal leakage, or visibly worn impeller vanes, it's usually more cost-effective to replace it than to keep chasing repairs — especially once seal or motor damage is involved.
When you're sourcing a replacement submersible sludge pump, have the following ready so you get a like-for-like (or properly upgraded) match: your existing pump model, required flow rate, head, discharge diameter, motor power, speed, solid particle size tolerance, and the characteristics of the medium you're pumping. Sending this information upfront, rather than just the old model number, is what lets a supplier confirm whether a direct replacement or a revised configuration is the better fit.
Hydroman® builds submersible sludge pumps around heavy duty, continuous-service construction rather than light-duty designs stretched to cover heavy applications. That shows up in the large solid-passage capability across the range, multiple pump configurations for different flow and head requirements, and application-specific pump selection support rather than a one-size-fits-all recommendation. Hydroman also supports replacement pump sourcing when you're matching an existing installation, and offers OEM/ODM options alongside global industrial pump supply for buyers sourcing at scale. As one of the submersible sludge pump manufacturers serving both municipal and industrial customers, the goal is straightforward: match the right configuration to your actual sludge, not just your flow number.
What is a submersible sludge pump? It's an electric pump designed to be fully submerged in the sludge, sediment, or wastewater it's pumping, rather than mounted dry and drawing the medium up through suction piping. Submerging the pump avoids priming issues and lets it sit directly inside a tank, sump, or pit.
What is the capacity of the 150TJQ18.5-50H6B? Up to 200 m³/h.
What is the head of the 150TJQ18.5-50H6B? 12 m.
What size solids can this submersible sludge pump handle? Up to 56 mm, though actual passage in service depends on the real particle shape, fiber content, and concentration in your medium.
How powerful is the motor? 18.5 kW, approximately 24 HP.
What is the discharge size? 150 mm.
What is the operating speed? 980 rpm.
Can this pump be used for sewage sludge? Yes, provided the sludge characteristics and your operating conditions are compatible with this configuration — check solids concentration and particle size against the specs above before finalizing selection.
Request a Quote for the 150TJQ18.5-50H6B
Ready to move forward? Send over the following and you'll get a configuration and price matched to your actual application, not a generic quote:
Source referenced: U.S. Environmental Protection Agency, Office of Water, POTW Sludge Sampling Guidance (EPA 833-B-89-100).
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