✅ This item is normally regularly stocked. Shipping times may vary depending on availability. Please contact us to confirm stock and shipping times. You will receive tracking details once the item has shipped.
Description
HCP AN-31 3-Inch Dewatering Pump for High-Volume Dirty Water Sites
Product Overview
The HCP AN-31 submersible dewatering pump is the 3-inch, high-volume model in HCP's AN line. Its 1 HP motor moves up to 135 GPM (about 8,100 GPH) through a 3-inch discharge. A cast-iron vortex impeller stands up to grit and silt. Reach for it when the job is moving water fast, not lifting it high.
Quick Specs
- Horsepower: 1 HP (0.75 kW)
- Voltage / Phase: 120V 1-phase (also 208/240V and 575V 3-phase), 10 A at 120V, 60 Hz
- Discharge: 3 inch (80 mm), Female NPT
- Max Flow: 135 GPM (about 8,100 GPH)
- Max Head: 40 ft
- Solids Handling: 1/4 inch (7 mm)
- Impeller: Cast-iron vortex (FC200)
- Speed: 2800 rpm
- Cord: 30 ft, 3-prong 120V plug
Key Features of HCP AN-31 Submersible Dewatering Pumps
- The 3 inch discharge and 1 HP motor move up to 135 GPM, roughly 8,100 GPH, so the AN-31 empties a flooded pit or trench far faster than a 2 inch pump.
- Its impeller is cast iron (FC200), not the plastic impeller used on the smaller AN pumps, giving the AN-31 an all-metal wet end for gritty, high-volume work.
- The vortex design lets silt and stringy debris up to 1/4 inch (7 mm) slip through instead of wrapping or packing the impeller.
- Twin mechanical seals (carbon/ceramic and silicon carbide) run in an oil bath. On the 120V model, an auto-cut thermal protector and a moisture sensor shut the motor down before it overheats.
- The IP68 motor runs fully submerged to 33 ft (10 m), and a stainless strainer screens out stones before they reach the impeller.
Specifications
| Category | Details |
|---|---|
| Brand | HCP |
| Model | AN-31 |
| SKU (by voltage) | AN-31-6117EPE3NX (120V), AN-31-63AOEXE4NX (240V), AN-31-635OEXE4NX (575V) |
| Product Type | Submersible dewatering / sump pump |
| Motor Output | 1 HP (0.75 kW); input 1.1 kW |
| Voltage Options | 120V 1-phase, 208/240V 3-phase, 575V 3-phase, 60 Hz |
| Rated Current | 10 A (120V 1-phase) |
| Start Method | Capacitor (120V) |
| Speed | 2800 rpm (2 pole) |
| Insulation Class | B |
| Discharge | 3 inch (80 mm), Female NPT |
| Max Flow | 135 GPM (about 8,100 GPH) |
| Max Head | 40 ft |
| Solids Handling | 1/4 inch (7 mm) |
| Impeller | Cast iron (FC200), vortex |
| Mechanical Seal | Double (carbon/ceramic upper, silicon carbide lower), oil-filled (VG32, 190 cc) |
| Casing / Volute | Cast iron (FC200) |
| Motor Frame | 304 stainless steel (SUS304) |
| Shaft | SUS410 stainless |
| Strainer | 304 stainless steel |
| Cooling | External |
| Protection Devices | Auto-cut thermal protector and moisture sensor (120V 1-phase) |
| Ingress Protection | IP68 |
| Max Submersion Depth | 33 ft (10 m) |
| Max Liquid Temp | 104F (40C) |
| Cord | 30 ft, SJOW, 3-prong 120V plug |
| Weight | 37 lb (17 kg) 1-phase; 35 lb (16 kg) 3-phase, less cable |
| Certifications | cUL (UL778), CSA C22.2 No. 108-14 |
| Manufacturer | HCP Pump Manufacturer Co., Ltd. |
Performance Overview
The AN-31 trades lift for flow: about 40 ft of head at shutoff, but up to 135 GPM near the bottom of the curve. It is a high-volume mover, at its best on low-lift, high-inflow work rather than deep, high-head pumping.
AN-21A (2 inch) vs AN-31 (3 inch)
Both are 1 HP AN-series dewatering pumps that pass 1/4 inch solids. The choice is flow versus lift.
| Spec | AN-21A (2 inch) | AN-31 (3 inch) |
|---|---|---|
| Discharge | 2 inch | 3 inch |
| Max flow | 88 GPM | 135 GPM (about 8,100 GPH) |
| Max head | 53 ft | 40 ft |
| Solids | 1/4 inch (7 mm) | 1/4 inch (7 mm) |
| Impeller | Plastic (PA+G50) | Cast iron (FC200) |
| Best for | Higher lift, deeper pits, longer runs | Higher volume, low lift, heavy inflow |
Applications
- Clearing flooded excavations, trenches, and pits fast
- Storm and heavy-inflow cleanup where volume outruns a 2-inch pump
- Sump and pit drainage on large jobsites
- Draining ponds, tanks, and cofferdams
- Municipal and utility dewatering of silty, gritty water
Buy the HCP AN-31 Submersible Dewatering Pump Online from Cleanflow
When the job is about moving a lot of dirty water fast, the HCP AN-31 submersible dewatering pump is the 3-inch, cast-iron option in HCP's dewatering line. 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.
Compare it against the rest of the submersible dewatering pumps range, then add the AN-31 to your cart or contact us to size the right pump for your flow.
Frequently Asked Questions
Does the HCP AN-31 replace the A-31V?
Yes. The AN-31 is HCP's replacement for the discontinued A-31V, keeping the 1 HP, 3-inch format with an updated AN-series motor. It comes in 120V, 240V, and 575V, so an A-31V swaps out without changing the discharge.
How much water does the AN-31 move?
Up to about 135 GPM, roughly 8,100 GPH, with a maximum head near 40 ft. Flow is strongest at low lift, which is where a 3-inch pump like this earns its keep.
Should I get the 2-inch AN-21A or the 3-inch AN-31?
Choose by flow versus lift. The 3-inch AN-31 moves far more water (about 135 GPM) at lower head, for high-inflow, low-lift jobs. The 2-inch AN-21A pushes less flow but higher head (near 53 ft) for deeper pits and longer runs.
Does the 3 inch discharge mean it handles bigger solids?
No. Discharge size sets flow, not solids. The AN-31 passes 1/4 inch (7 mm) solids, the same as the 2 inch AN pumps. It is a dirty-water dewatering pump, not a trash pump for large debris.
Does the AN-31 have a cast iron impeller?
Yes. Where the smaller AN pumps use a plastic impeller, the AN-31 has a cast-iron (FC200) impeller and casing for an all-metal wet end. It is cUL (UL778) and CSA certified with an IP68 sealed motor.
Manuals & Documentation
✅ This item is normally regularly stocked. Shipping times may vary depending on availability. Please contact us to confirm stock and shipping times. You will receive tracking details once the item has shipped.
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