Description
HCP AN-21.5H 1.5 HP High-Head Dewatering Pump for Deep Pits
Product Overview
The HCP AN-21.5H is a high-head submersible dewatering pump, the high-lift member of HCP's 2-inch AN line. Its 1.5 HP motor moves muddy and silty water up to 73 ft of head at up to 88 GPM, clearing deep excavations, high-rise transfers, and long discharge runs that stall a lower-powered pump.
Quick Specs
- Horsepower: 1.5 HP (1.1 kW)
- Voltage / Phase: 120V 1-phase (14.4 A), also 240V 3-phase (4.6 A) and 575V 3-phase (1.8 A), 60 Hz
- Discharge: 2 inch (50 mm), Female NPT
- Max Head: 73 ft
- Max Flow: 88 GPM
- Solids Handling: 5/16 inch (8 mm)
- Impeller: Cast-iron vortex
- Cord: 30 ft, 3-prong 120V plug
Key Features of HCP AN-21.5H High Head Dewatering Pumps
- With 1.5 HP the AN-21.5H reaches about 73 ft of head, roughly seven storeys of lift, so it clears deep excavations and long vertical runs that stall a 1 HP dewatering pump.
- As a high-head submersible dewatering pump, it is built for lift, not extra flow. Like the 1 HP AN-21A, it peaks near 88 GPM, but the added half-horsepower pushes that water far higher.
- A cast-iron (FC200) vortex impeller and casing stand up to abrasive, silty, sandy water, where the plastic impeller on the 1 HP AN-21A would wear faster. Solids up to 5/16 inch (8 mm) pass through the 304 stainless steel bottom strainer.
- Twin mechanical seals, carbon/ceramic over silicon carbide, run in an oil bath to keep grit and water out of the motor. The three-phase models add a built-in auto-cut thermal protector against overload.
- The IP68 sealed motor, with a 304 stainless steel frame and cast-iron body, is rated for continuous submersion to 33 ft (10 m) at 120V, 240V, and 575V.
Specifications
| Category | Details |
|---|---|
| Brand | HCP |
| Model | AN-21.5H |
| SKU (by voltage) | AN-21.5H-6117EPE3NX (120V), AN-21.5H-63AOEXE4NX (240V), AN-21.5H-635OEXE4NX (575V) |
| Product Type | Submersible dewatering pump (high head) |
| Motor Output | 1.5 HP (1.1 kW output); input 1.55 kW (120V), 1.45 kW (3-phase) |
| Voltage Options | 120V 1-phase, 240V 3-phase, 575-600V 3-phase, 60 Hz |
| Rated Current | 14.4 A (120V), 4.6 A (240V 3-ph), 1.8 A (575V 3-ph) |
| Start Method | Capacitor (120V), DOL (3-phase) |
| Speed | 3400 rpm (2 pole) |
| Insulation Class | F |
| Discharge | 2 inch (50 mm), Female NPT |
| Max Head | 73 ft |
| Max Flow | 88 GPM |
| Solids Handling | 5/16 inch (8 mm) |
| Strainer | 304 stainless steel (bottom suction) |
| Impeller | Vortex, FC200 cast iron |
| Mechanical Seal | Double (carbon/ceramic upper, silicon carbide lower), oil-filled (VG32, 230 cc) |
| Casing / Volute | Cast iron (FC200) |
| Motor Frame | 304 stainless steel (SUS304) |
| Shaft | SUS410 stainless |
| Bearings | 6202ZZ, 6303ZZ |
| Cooling | External |
| Protection Devices | Auto-cut thermal protector (three-phase per spec sheet); confirm single-phase |
| Ingress Protection | IP68 |
| Max Submersion Depth | 33 ft (10 m) |
| Max Liquid Temp | 104F (40C) |
| Max Starts per Hour | 10 |
| Cord | SJOW (120V) / SOW (3-phase); 30 ft, 3-prong 120V plug (per HCP AN-series quote) |
| Weight | 42 lb (19 kg) 1-phase; 39 lb (17.5 kg) 3-phase, less cable |
| Certifications | cUL (UL778), CSA C22.2 No. 108-14 |
| Manufacturer | HCP Pump Manufacturer Co., Ltd. |
Performance Overview
The AN-21.5H is a high-head submersible dewatering pump, so it lifts to about 73 ft, well above the 1 HP AN-21A, while both peak near 88 GPM. Flow is highest at low lift and tapers as head rises, so match the pump to the vertical distance you need to clear.
AN-21.5H vs AN-21A: Do you need the extra head?
Both are 2-inch AN dewatering pumps that peak near 88 GPM. The AN-21.5H adds lift and a tougher impeller. Choose based on how high you need to push the water and how abrasive it is.
| Spec | AN-21A (standard) | AN-21.5H (high head) |
|---|---|---|
| Motor | 1 HP | 1.5 HP |
| Max flow | 88 GPM | 88 GPM |
| Max head | About 53 ft | About 73 ft |
| Impeller | Plastic (PA+G50) | Cast iron (FC200) |
| Solids | 1/4 inch (7 mm) | 5/16 inch (8 mm) |
| Insulation class | B | F |
| Best for | Standard pits and discharge runs | Deep pits, high-rise, long runs, abrasive water |
Applications
As a high-head submersible dewatering pump, the AN-21.5H suits jobs where water has to move up and out:
- Deep excavation and foundation pits that need high lift
- Pumping water up from basements and sub-levels to grade
- High-rise and multi-storey construction dewatering
- Long-distance or uphill discharge runs
- Muddy, silty, and sandy water from sumps, vaults, and cofferdams
Run the 2-inch discharge into a 2 inch layflat discharge hose to carry water clear of the work area.
Buy the HCP AN-21.5H High Head Dewatering Pump Online from Cleanflow
When water has to climb out of a deep excavation, a flooded sub-level, or a long uphill run, the HCP AN-21.5H submersible dewatering pump delivers up to 73 ft of head on 1.5 HP, with a cast-iron impeller built for silty, abrasive water. Cleanflow Utility Supply Company is an authorized HCP dealer, stocking and shipping HCP pumps across Canada and the continental USA, with free shipping on orders over $199.
Browse the full submersible dewatering pumps range to compare flow and head, then add the AN-21.5H to your cart or contact us to size the right pump for your lift.
Frequently Asked Questions
How high can the AN-21.5H lift water?
As a high-head submersible dewatering pump, it reaches up to about 73 ft of head, around 31 psi. That lift is what separates the 1.5 HP AN-21.5H from the 1 HP AN-21A, which tops out near 53 ft. Both move up to 88 GPM.
AN-21A or AN-21.5H, which do I need?
Both peak near 88 GPM, so choose by lift and by how abrasive the water is. Use the 1 HP AN-21A for standard pits and runs. Step up to the 1.5 HP AN-21.5H when you need to push water higher, out of a deep excavation, up several floors, or through a long uphill line, or when grit calls for its cast-iron impeller instead of the AN-21A's plastic one.
Is the AN-21.5H a sewage pump?
No. It is a dewatering pump. It passes solids up to 5/16 inch (8 mm) through a bottom strainer, which suits muddy, silty, and sandy water, not raw sewage. For sewage with 2-inch solids, use a sewage ejector such as the HCP FN-21UL.
What is the impeller made of?
Cast iron (FC200). The 1 HP AN-21A uses a plastic (PA+G50) impeller, so the AN-21.5H is the more durable of the two in abrasive, gritty water, which is common in construction dewatering.
Is the AN-21.5H certified, and what voltages does it come in?
It carries CSA C22.2 No. 108-14 and cUL (UL778), with an IP68-sealed motor. It comes in 120V single-phase (14.4 A), 240V three-phase (4.6 A), and 575V three-phase (1.8 A).

















