Grundfos SQE 3-55 96510158 - Anglian Pumping Services

Name: Grundfos SQE 3-55 96510158
Brand: Grundfos
SKU: 96510158
Price: 1198.43 GBP
Availability: InStock

In stock

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Established 1975
Trusted by thousands of customers

The Grundfos SQE 3-55 (96510158) is a 3″ stainless steel variable-speed submersible borehole pump for domestic private water supplies, farms and irrigation where the water sits deeper. It delivers 3 m³/h (50 litres/min) at 56 m head from a standard 230V single-phase supply. The 1.15 kW MSE3 permanent-magnet motor has built-in dry-running protection, soft start and voltage protection. Pair it with a Grundfos CU 301 and it holds a constant pressure at the taps. It fits any borehole from 76 mm (3″) upwards.

3 m³/h

Rated flow at 56 m

74 m

Max. head

1.15 kW

230V single-phase

76 mm

Min. borehole

Performance at 50 Hz, full speed

Flow (l/min)	0	15	30	45	60	70
Head (m)	74	72	68	60	47	34
Pressure (bar)	7.2	7.1	6.7	5.9	4.6	3.3

Head is what the pump produces. Your pressure at the surface is that figure less the depth to the pumping water level and the pipe losses.

Variable speed
CU 301 compatible
Dry-run protection
Soft start
Rp 1¼ outlet
2-year warranty

Constant pressure needs a CU 301. The pump comes with a 1.5 m motor lead. You’ll need 3-core drop cable and a cable joint kit to reach the surface. We can size and supply the cable and the CU 301 package for your borehole.

Full Description

More about this product

Full Description

Grundfos SQE 3-55 overview

The SQE 3-55 is the 4-stage model in the Grundfos SQE 3 family and the first in that family to use the 1.15 kW motor. It delivers 3 m³/h, a typical family-home flow, from boreholes where the pumping water level sits around 25–35 m down. It also suits sites where water has to climb to a house or tank on higher ground. It is one of the most widely fitted sizes on UK private water supplies, and it works just as well for farms, stables, holiday lets and irrigation.

It uses the same pump end as the SQ 3-55, fitted with Grundfos’ MSE3 variable-speed motor. On its own it runs like a standard SQ. Add a CU 301 control unit and it becomes a constant-pressure system. The pump speeds up and slows down to hold the pressure you set, talks to the CU 301 over the existing power cable, and shows faults on the CU 301 display.

50 l/min

At 56 m head

74 m

Max. head (closed valve)

8.4 A

Rated current

5.4 kg

Net weight

Performance

All figures are at full speed. Head is the total lift the pump must provide: depth to the pumping water level, plus height to the outlet, plus pipe losses, plus the pressure you want (about 10 m for each bar).

Flow (m³/h)	Flow (l/min)	Head (m)	Equivalent pressure
0	0	74	7.4 bar (closed valve)
1.5	25.0	70	7.0 bar
2.0	33.3	67	6.7 bar
2.5	41.7	63	6.3 bar
3.0	50.0	56	5.6 bar (rated point)
3.5	58.3	48	4.8 bar

Worked example: take a pumping water level of 28 m, add a 4 m rise to the plant room, about 4 m of pipe losses and a 2 bar (20 m) CU 301 set point. That gives 56 m, and the SQE 3-55 holds that pressure at up to about 3 m³/h. If your water level is shallower, the SQE 3-40 on the smaller motor may be enough. If it’s deeper, step up to the SQE 3-65.

Key features

Constant pressure with CU 301

Set the pressure on the CU 301 and the SQE varies its speed to hold it as taps open and close. You get steady showers, fewer starts and stops, and a smaller pressure vessel.

No extra cables

The SQE and CU 301 communicate over the pump’s own power cable, so no signal wire goes down the borehole. Faults and alarms show on the CU 301 display.

Dry-running protection

The motor monitors its own power draw. It cuts out if the borehole runs dry and restarts automatically once the water recovers, protecting both pump and borehole.

Soft start and voltage protection

A smooth ramp-up keeps start current low and reduces water hammer. Over- and under-voltage protection stops the motor below 150V or above 315V before it can burn out.

Built for real boreholes

Floating impellers with tungsten carbide/ceramic bearings tolerate up to 50 g/m³ of sand. A spring-loaded non-return valve is built into the top of the pump.

Stainless steel construction

The pump sleeve and motor are EN 1.4301 (AISI 304) stainless steel, with glass-reinforced polyamide hydraulics, for a long life in clean groundwater (pH 5–9).

Technical specification

Model / part number	Grundfos SQE 3-55 / 96510158
Rated flow / head	3 m³/h at 56 m
Max. head	74 m
Stages	4
Motor	Grundfos MSE3 variable-speed permanent-magnet, 1.15 kW (P2)
Supply	1 × 200–240V, 50 Hz
Power input (P1) / rated current	1.65 kW / 8.4 A
Rated speed	10,700 rpm
Controls	Grundfos CU 300 / CU 301 (power-line communication)
Enclosure / insulation class	IP68 / F
Outlet	Rp 1¼ female
Min. borehole diameter	76 mm (3″)
Overall length	768 mm
Net weight	5.4 kg
Max. liquid temperature	35 °C
Max. sand content	50 g/m³
Materials	Stainless steel EN 1.4301 (AISI 304), polyamide impellers
Non-return valve	Built in
Motor lead	1.5 m (3-core drop cable required)
Warranty	2 years

Installation notes

Hang the pump below the lowest expected pumping water level. It must be fully submerged before it is switched on.
Use 3-core submersible drop cable, because Grundfos SQ/SQE motors don’t take 4-core. Join it to the motor lead with a heat-shrink cable joint kit.
The pump draws 8.4 A, so size the cable carefully for the run length to keep voltage drop low. We can confirm the right cross-section for your depth.
For constant pressure, fit the CU 301 with its pressure sensor and a small diaphragm pressure vessel on the surface pipework.
Check the borehole yield can sustain 3 m³/h. If the yield test shows less, an SQE 2 or SQE 1 is a safer match.

Don’t need constant pressure? The Grundfos SQ 3-55 (96510206) uses the same pump end with a fixed-speed MS3 motor and runs from a standard pressure switch and vessel.

Grundfos SQE 3-55 FAQs

How much water does the Grundfos SQE 3-55 pump?

At full speed it delivers about 3 m³/h (50 litres/min) at 56 m of total head, and up to 58 litres/min at 48 m. Delivery stops at 74 m.

What’s the difference between the SQE 3-55 and SQ 3-55?

They share the same pump end, performance and borehole fit. The SQE has the MSE3 variable-speed motor, so with a CU 301 it gives constant pressure. The SQ is fixed-speed and runs from a pressure switch.

Do I need a CU 301?

Only if you want constant pressure. Without one, the SQE runs at fixed speed like a standard SQ. With a CU 301, you set the pressure on the control unit and the pump adjusts its speed to hold it.

Will the SQE 3-55 fit my borehole?

Yes, if the borehole or liner has an internal diameter of at least 76 mm (3″). It fits comfortably in standard 4″, 5″ and 6″ domestic boreholes.

What happens if my borehole runs dry?

The SQE senses the drop in power when there is no water, stops itself, and restarts automatically once the water recovers. If a CU 301 is fitted, the dry-running alarm also shows on its display.

What cable does it need?

A 3-core submersible drop cable (live, neutral, earth) from the 1.5 m motor lead to the surface, joined with a heat-shrink joint kit. The CU 301 talks to the pump over the same cable, so no extra wiring is needed.

Downloads

instructions PDF
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Data Sheet PDF
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Delivery Information

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 Grundfos SQE 3-55 96510158. 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 types of Grundfos pumps are available?

Grundfos offers circulators, booster pumps, borehole pumps, drainage pumps and other solutions for domestic and commercial systems.

How do I identify the correct Grundfos pump model?

Use the model name and product number on the pump nameplate, then check the electrical, hydraulic and connection specifications.

Can a Grundfos pump improve household water pressure?

A suitably selected Grundfos booster system can improve water pressure or flow, subject to the property’s water supply and installation requirements.

More about this product

Grundfos SQE 3-55 overview

Performance

Key features

Technical specification

Installation notes

Grundfos SQE 3-55 FAQs

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Frequently Asked Questions