Product Description
Heavy Duty 1 HP Submersible Pump for Construction Site Drainage and Silty Water
Product Overview
The HCP Model A-21 Submersible Pump is a durable 1 HP unit designed specifically for muddy and silty water applications. It is commonly installed in basement sump pits, construction trenches, and utility drainage areas. The pump features a municipal-quality air-filled motor housed in a cast-iron and stainless steel frame. This construction fits demanding dewatering tasks where abrasive suspended solids are present. HCP is Taiwan's most successful submersible pump manufacturer.
Key Benefits of A-21 Submersible Pump
Achieves rapid water removal with a maximum flow rate of 88 GPM.
Handles abrasive liquids and suspended solids up to 3/8" to prevent pump failure.
Ensures extended operational life with a dual mechanical seal system in a food-grade oil-filled chamber.
Prevents motor damage during heavy use with an integrated auto-cut thermal protector.
Resists corrosion and impact with a cast iron volute and 304 stainless steel motor frame.
Prevents clogging from rocks and debris using a robust bottom-end strainer.
Integrates easily into existing systems as a versatile 2 inch Dewatering Pump.
HCP Model A-21 pump specifications
Category
Details
Model
A-21
Horsepower
1.0 HP
Voltage
120V (Single Phase)
Discharge Port
2" FPT
Max Flow (Capacity)
88 GPM
Max Head
50 ft
Impeller Type
Vortex Open
Solid Handling
3/8" (10mm)
Motor Type
Air Filled Motor
Weight
37 lb (Operating)
Dimensions
10" x 7" x 17"
Certifications
cUL and UL Certified
What’s Included
HCP Model A-21 Submersible Dewatering Pump
Heavy-duty Power Cable with Epoxy Resin Seal Base
Convertible Discharge Outlet (2" FPT)
Key Features of HCP Model A-21
Double Mechanical Seals
Equipped with a carbon/ceramic upper seal and silicon/carbide lower seal to ensure longevity and the best seal effect in dirty water.
Vortex Impeller
The glass fiber reinforced thermoplastic impeller creates a vortex flow that handles fluid turbulence and resists abrasion from sand and silt.
Auto-Cut Thermal Protection
The single-phase motor includes a built-in thermal protector that automatically shuts off the pump if it overheats, ensuring this thermal protection water pump lasts longer.
Epoxy Cable Base
An epoxy resin seal prevents moisture from entering the motor through the core wires, providing superior protection against water ingress.
Robust Strainer
A durable bottom strainer provides a solid base and filters out large stones, making this the best submersible pump for muddy water dewatering in its class.
Sturdy Construction
The upper cover and volute are made of cast iron, while the motor frame is constructed from 304 stainless steel for maximum durability.
Performance Overview
HCP A-21 1HP 120V submersible pump delivers consistent performance with a maximum head of 50 feet and flow rates up to 88 GPM. It is suitable for intermittent duty cycles common in sump and drainage applications. The pump operates optimally in liquid temperatures between 32°F and 104°F (0~40°C), handling wastewater drainage solutions effectively without compromising efficiency.
Applications
Basement sump pits
Construction site dewatering
Utility tunnels and manholes
Emergency flood water removal
Light industrial drainage
Rainwater harvesting systems
Silty water transfer
Common Use
Residential Sump Systems
General Dewatering
Civil Engineering Projects
Installation & Use Notes
Requires a 2-inch discharge connection; use rigid pipe or layflat hose.
Do not operate the pump dry; ensure it remains submerged during use.
Designed for dirty water containing sand and silt; not intended for heavy sewage or sludge.
Ensure the power source matches the 120V requirement for the single-phase model.
Accessories & Add-Ons
88 GPM submersible pump with float switch: Pair with a piggyback switch for automatic operation. We recommend the Piggyback Plug Pump Float Switch.
Layflat hose for temporary discharge lines.
Professional-Grade Pumping Solutions by Cleanflow
Cleanflow provides a full range of HCP equipment, including the durable dewatering pump for silty water applications. We supply contractors and industrial operators across Canada and the USA with reliable, high-performance submersible dewatering pumps.
Count on us to help you find the right HCP pump for your needs, supported by expert guidance and dependable availability.
Frequently Asked Questions
Is this pump suitable for continuous duty?
The HCP A-21 is designed for heavy-duty applications but is best suited for intermittent duty cycles typical of sump and dewatering tasks.
Can this pump handle rocks?
The pump includes a strainer that prevents rocks larger than 3/8" from entering. It is designed to handle sand and small suspended solids effectively in silty water applications.
Does the HCP Model A-21 come with a float switch?
No, the standard model does not include a float switch. However, it is compatible with piggyback float switches for automatic operation.
What is the voltage requirement?
This model operates on standard 120V single-phase power.
Where can I buy the HCP Model A-21 submersible dewatering pump?
The HCP Model A-21 can be purchased directly through Cleanflow, ensuring genuine HCP products and professional support.
Is the motor oil-filled or air-filled?
The motor is air-filled for efficiency, while the mechanical seals operate in a food-grade oil-filled chamber for lubrication and cooling.
