Pedrollo 4HR-HYD 4-Inch Borehole Pump Ends
Pedrollo 4HR 18/12 HYD 4-Inch Borehole Pump End 2203920
- Established 1975
- Trusted by thousands of customers
The Pedrollo 4HR 18/12 HYD is a 4″ submersible borehole pump end for a 3 kW (4 HP) motor, delivering up to 420 l/min and 66.5 m head.
Pump end only, with no motor. Micro-cast AISI 304 stainless steel impellers, diffusers, delivery port and motor bracket resist sand abrasion and corrosion, even in marine environments or brackish water. Fit it to a 4″ motor of 3 kW (4 HP).
More about this product
Product overview
The Pedrollo 4HR 18/12 HYD is a 4″ submersible borehole pump end for clean or brackish water with up to 100 g/m³ of sand. It covers 50 to 420 l/min with a working head of 66.5 m down to 14.5 m, and needs a 4″ motor of 3 kW (4 HP). Pedrollo’s own 4″ motors are the 4PD rewindable oil-filled and 4PS encapsulated water-filled types. Pedrollo pair this size with a three-phase 400 V motor.
Pedrollo build the 4HR in micro-cast stainless steel for high mechanical resistance against sand abrasion and corrosion, even in marine environments or brackish water installations. It suits industrial, civil and agricultural use, including water distribution with pressure tanks, irrigation, pressure boosting and fire-fighting systems.
The delivery port, check valve, motor bracket (sized to NEMA standards), impellers, diffusers, pump shaft, tow coupling, filter and cable sheath are AISI 304 stainless steel. The pump bearings and wear rings use a special elastomer. The delivery port has a 2″ ISO 228/1 thread.
Key features
Typical applications
Technical specifications
| Brand / Series | Pedrollo — 4HR-HYD |
| Model | 4HR 18/12 HYD (pump end) |
| Pedrollo code | 2203920 |
| Supplied as | Pump end only, no motor |
| Motor needed | 4″ motor, 3 kW / 4 HP (P2), three-phase |
| Flow range | 50–420 l/min |
| Head range | 66.5–14.5 m |
| Peak efficiency | η = 67% (4HR 18) |
| Delivery port | 2″ ISO 228/1, micro-cast AISI 304 stainless steel |
| Check valve | AISI 304 stainless steel |
| Motor bracket | AISI 304 micro-cast stainless steel, sized to NEMA standards |
| Impellers and diffusers | AISI 304 micro-cast stainless steel |
| Pump shaft | AISI 304 stainless steel |
| Pump bearings and wear rings | Special elastomer |
| Tow coupling, filter and cable sheath | AISI 304 stainless steel |
| Pump end length | 1,022 mm |
| Pump diameter | 100 mm |
| Well size | 4″ |
| Maximum sand content | 100 g/m³ |
| Liquid temperature | Up to +40 °C |
| Installation | Vertical or horizontal |
| Maximum depth | 200 m below water level with 4PD motors, 300 m with 4PS motors |
| Minimum motor cooling flow | 8 cm/s |
| Starts per hour | 20, at regular intervals |
| Duty | Continuous running S1 |
| Efficiency index | MEI ≥ 0.40 |
| Liquid | Clean or brackish water |
Installation
4HR 18 range
| Model | Code | Motor needed | Flow | Head | Delivery |
|---|---|---|---|---|---|
| 4HR 18/4 | 2203890 | 1.1 kW / 1.5 HP | 50–420 l/min | 22–5 m | 2″ |
| 4HR 18/6 | 2203900 | 1.5 kW / 2 HP | 50–420 l/min | 33.5–7 m | 2″ |
| 4HR 18/9 | 2203910 | 2.2 kW / 3 HP | 50–420 l/min | 50–11 m | 2″ |
| 4HR 18/12 | 2203920 | 3 kW / 4 HP | 50–420 l/min | 66.5–14.5 m | 2″ |
| 4HR 18/16 | 2203930 | 4 kW / 5.5 HP | 50–420 l/min | 89–19 m | 2″ |
| 4HR 18/22 | 2203940 | 5.5 kW / 7.5 HP | 50–420 l/min | 122–26.5 m | 2″ |
| 4HR 18/30 | 2203950 | 7.5 kW / 10 HP | 50–420 l/min | 167–36 m | 2″ |
Head shown as the working range from minimum to maximum flow. Performance to Pedrollo 50 Hz data. Pump ends only, without motors.
Frequently asked questions
Does it come with a motor?
No. This is the pump end only. Fit it to a 4″ motor of 3 kW (4 HP); the AISI 304 motor bracket follows NEMA standards.
What size borehole does it need?
Pedrollo design the 4HR for 4″ wells. The pump measures 100 mm across.
Can it pump brackish water?
Yes. The micro-cast AISI 304 construction resists corrosion, even in marine environments or brackish water installations.
How much sand can it handle?
Up to 100 g/m³.
Can I install it horizontally?
Yes. Pedrollo allow horizontal installation on the 4HR up to 12 stages, and this model has 12.
How deep can it go?
Up to 200 m below water level with a Pedrollo 4PD motor, or 300 m with a 4PS motor.
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Data Sheet PDFDownload
Standard delivery:
Standard delivery is free on most orders. Some items may incur a delivery charge depending on weight, size or value. Any applicable charge will be displayed at checkout.
Deliveries will typically be made between 7am and 6pm, Monday to Friday (excluding public holidays).
Next day delivery:
Next working day delivery is available for a £16.50 + VAT delivery charge.
Orders must be placed before 12 noon to qualify for next working day delivery. Orders placed after 12 noon on Thursday but before noon on Friday will be delivered the following Monday. Orders placed after 12 noon on Friday will be delivered on Tuesday.
Pallet/Large/Difficult items:
Some large, heavy or difficult to transport items may incur an additional delivery charge. Please contact us for a delivery quote before ordering.
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Frequently Asked Questions
Quick answers to common questions about the Pedrollo 4HR 18/12 HYD 4-Inch Borehole Pump End 2203920. For technical specifications, see the product details above; for sizing or installation advice, contact our team. If you have any other questions, we're happy to help.
What is a submersible pump?
A submersible pump is designed to operate fully submerged in the liquid it is moving. The motor is sealed inside the pump body and cooled by the surrounding water. Submersibles are used for drainage, sewage, septic tanks, deep wells and boreholes, and for raising water from sumps, cellars and floodwater. Many stocked at Anglian Pumping handle solids in suspension.
Can submersible pumps handle solids and sewage?
Yes – some submersibles are designed for clean water only, others handle solids up to 50 mm or full raw sewage. Anglian Pumping stocks ABS, BBC, Flygt and T-T Submersibles ranges that include vortex, single channel and grinder impellers for different solids handling requirements. Always match the pump to the maximum solid size and the type of effluent it will see.
When should I use a submersible pump instead of a surface pump?
Use a submersible when the water level is more than around 8 metres below the pump installation point – surface pumps cannot self-prime beyond that depth. Submersibles are also better when the liquid contains solids, when noise must be minimised, or when the pump needs to operate in confined spaces such as sumps and chambers where a surface pump would not fit.