Ebara Compact BM/15G Watercontrol Pressure Booster Set

The Ebara COMPACT BM/15G WATERCONTROL pressure booster set, reference 623GP05110710, is an automatic pressurization unit made up of a horizontal multistage centrifugal electric pump with 1.1 kW / 1.5 HP and a WATERCONTROL electronic pressure controller. It is specially designed to increase pressure and provide automatic water supply in single-family homes, irrigation systems, small gardens, and other applications that require clean water transfer with a compact, quiet, and automatic unit.

The COMPACT BM/15G pump delivers performance of up to 7.2 m³/h within the hydraulic curve published by Ebara and reaches a total head of 22 meters at that flow rate. It features a cast iron pump body and support, AISI 304 stainless steel outer sleeve, technopolymer impellers and diffusers, and an AISI 416 stainless steel shaft. The WATERCONTROL regulator automates start and stop when consumption points are opened or closed and protects the pump against dry running.

Automatic pressure booster set for homes and irrigation

Ebara develops the COMPACT pressure booster sets for applications where an automatic water supply is needed or where insufficient mains pressure must be increased.

Typical applications include:

• Pressurization of single-family homes.
• Pressure boosting in networks with insufficient pressure.
• Water distribution from tanks.
• Small irrigation and sprinkler systems.
• Vehicle washing.
• Transfer and movement of clean water.
• Integration into certain machines and industrial equipment.

The final selection must be made by checking that the flow rate and total head required by the installation fall within the pump operating curve.

COMPACT BM/15G horizontal multistage centrifugal pump

The unit uses a horizontal multistage centrifugal electric pump. The use of several hydraulic stages makes it possible to achieve high pressures while maintaining a compact format, making it especially suitable for pressurization applications.

Ebara also highlights the COMPACT range for its low noise level, ease of use, robust structure, and ease of transport.

1.1 kW / 1.5 HP power

The COMPACT BM/15G is equipped with a motor with a rated power of 1.1 kW, equivalent to 1.5 HP.

The motor is a 2-pole asynchronous motor with forced ventilation and is configured in this version for single-phase supply.

230 V single-phase power supply

Reference 623GP05110710 corresponds to the 230 V ±10%, 50 Hz single-phase version.

The pump includes:

• Capacitor: 31.5 µF.
• Capacitor voltage: 450 V.
• Current draw: approximately 7.3 A.
• Automatic reset thermal overload protection: integrated.

The unit is supplied with a power cable and Schuko plug, simplifying commissioning when the electrical installation meets the manufacturer’s requirements.

Hydraulic performance of the COMPACT BM/15G

The official Ebara table shows the pump head variation according to flow rate.

• 1.2 m³/h: 59 m.c.a.
• 1.8 m³/h: 58 m.c.a.
• 2.4 m³/h: 56 m.c.a.
• 3.0 m³/h: 54 m.c.a.
• 3.6 m³/h: 51.5 m.c.a.
• 4.8 m³/h: 44.5 m.c.a.
• 6.0 m³/h: 34.5 m.c.a.
• 7.2 m³/h: 22 m.c.a.

These figures make it possible to size the unit according to the simultaneous flow required and the pressure or head that the installation must overcome.

Up to 7.2 m³/h within the published curve

For the COMPACT BM/15G, Ebara’s technical table provides performance up to a flow rate of 7.2 m³/h, equivalent to 120 l/min, at which point the total head is approximately 22 meters.

The maximum flow rate should not be confused with the recommended flow rate for any installation: the appropriate operating point must be selected by considering pressure losses, geometric head, and the residual pressure required at the consumption points.

WATERCONTROL automatic control

This reference includes the Ebara WATERCONTROL electronic pressure controller, responsible for automating pump operation.

The controller detects water demand and automatically starts the pump when a tap or valve is opened. When consumption stops, it shuts the electric pump down again.

This way, the user gets pressurized water supply without having to manually switch the pump on and off.

Dry-run protection

One of the main functions of WATERCONTROL is pump protection when water is lacking.

If the unit detects a dry-run condition, it stops the electric pump to help prevent damage caused by operating without the liquid needed to cool and lubricate the hydraulic components.

The controller also includes status indicator lights and a reset button.

1.5 bar start pressure

The WATERCONTROL used by Ebara has a start pressure of 1.5 bar.

This start pressure is fixed in the WATERCONTROL model and does not allow adjustment of the cut-in pressure.

This feature must be taken into account when designing the installation, especially when there is a considerable height difference between the pump and the consumption points.

WATERCONTROL for pumps up to 1.1 kW

The electronic WATERCONTROL pressure controller specifications are:

• Power supply: 230 V single-phase ±10%.
• Frequency: 50/60 Hz.
• Maximum current: 10 A.
• Maximum pump power: 1.1 kW.
• Start pressure: 1.5 bar.
• Maximum pressure: 10 bar.
• Maximum temperature: 60 °C for the controller.
• Protection: IP65.
• Pressure gauge: included.
• Connection: 1".

The maximum power accepted by WATERCONTROL matches the 1.1 kW of the COMPACT BM/15G pump installed in this unit.

Fixed-speed system

The COMPACT BM/15G WATERCONTROL is a fixed-speed pressure booster set. WATERCONTROL automates the start and stop of the electric pump, but it does not act as a frequency inverter.

Therefore, the available pressure during operation varies according to flow rate in line with the pump hydraulic curve.

Maximum working pressure of 10 bar

The COMPACT pump supports a maximum working pressure of 10 bar.

The hydraulic installation must include the necessary elements to ensure that the limits established for the pump, the controller, and the rest of the connected components are not exceeded.

Clean water up to 40 °C

Ebara specifies a maximum pumped liquid temperature of 40 °C for the COMPACT range.

The unit is mainly intended for moving and pressurizing clean water. It must not be used for chemically aggressive liquids, water containing solids, or fluids whose characteristics are not compatible with the pump materials.

Cast iron pump body

The electric pump uses a robust construction with different materials selected according to the function of each component:

• Pump body: cast iron.
• Support: cast iron.
• Outer sleeve: AISI 304 stainless steel.
• Impellers: technopolymer.
• Diffusers: technopolymer.
• Shaft: AISI 416 stainless steel.
• Mechanical seal: carbon / ceramic / NBR.

AISI 304 stainless steel outer sleeve

The AISI 304 stainless steel outer sleeve provides strength and protection to the hydraulic assembly, combined with the cast iron body and support used in the COMPACT series.

IP44 electrical protection of the pump

The COMPACT BM/15G motor has an IP44 protection rating and F-class insulation.

The WATERCONTROL regulator, on the other hand, has a higher IP65 protection rating.

These ratings do not eliminate the need to install the unit in a suitable location, protected from flooding, frost, and other environmental conditions that may affect its operation.

G 1¼" suction connection

The COMPACT BM/15 pump has a G 1¼" suction connection.

The pump discharge connection is G 1", a size compatible with the WATERCONTROL pressure controller installed at the outlet.

• Pump suction: G 1¼".
• Pump discharge: G 1".
• WATERCONTROL connection: 1".

Proper sizing of the suction pipe is especially important to avoid excessive pressure losses and pump operating problems.

Compact, low-noise pump

Ebara describes its COMPACT units as low-noise equipment with small dimensions and a resistant structure.

These features make them suitable for domestic installations where the unit must be placed in technical rooms, garages, or other areas close to the home.

BM/15 electric pump dimensions

The single-phase COMPACT BM/15 electric pump used as the base of the unit has a length of approximately 438 mm and a weight of approximately 15.9 kg, not including the WATERCONTROL regulator and other elements added to the assembly.

These figures refer specifically to the pump and should not be interpreted as the total dimensions or weight of the complete assembled unit.

Supply from a tank or insufficient-pressure network

Ebara designs the COMPACT unit for the distribution of pressurized water from a tank, both in installations with certain suction conditions and in flooded suction arrangements, as well as for boosting networks that do not provide sufficient pressure.

The suction installation must be carefully designed to avoid air ingress, excessive pressure losses, or conditions that could cause cavitation.

Minimal accumulation

This WATERCONTROL version uses an electronic controller instead of a large pressure tank. Ebara classifies it as a minimal accumulation solution.

This makes it possible to have a compact unit and simplifies the assembly compared with COMPACT versions equipped with 20, 24, or 50-liter pressure tanks.

Technical characteristics of the Ebara 623GP05110710

• Brand: Ebara.
• Reference: 623GP05110710.
• Model: COMPACT BM/15G WATERCONTROL.
• Type: automatic domestic pressure booster set.
• Number of pumps: 1.
• Pump type: horizontal multistage centrifugal.
• Control: WATERCONTROL electronic pressure controller.
• Speed: fixed.
• Power: 1.1 kW.
• Equivalent power: 1.5 HP.
• Power supply: 230 V single-phase ±10%.
• Frequency: 50 Hz for the pump.
• Pump current draw: 7.3 A.
• Capacitor: 31.5 µF / 450 V.
• Maximum flow rate shown on curve: 7.2 m³/h.
• Head at 7.2 m³/h: 22 m.c.a.
• Head at 6 m³/h: 34.5 m.c.a.
• Head at 4.8 m³/h: 44.5 m.c.a.
• Head at 3 m³/h: 54 m.c.a.
• Head at 1.2 m³/h: 59 m.c.a.
• Maximum working pressure: 10 bar.
• Maximum liquid temperature: 40 °C.
• Pump body: cast iron.
• Support: cast iron.
• Outer sleeve: AISI 304 stainless steel.
• Impellers and diffusers: technopolymer.
• Shaft: AISI 416 stainless steel.
• Mechanical seal: carbon / ceramic / NBR.
• Motor: 2-pole asynchronous.
• Ventilation: forced.
• Insulation: class F.
• Pump protection: IP44.
• Thermal overload protection: integrated, with automatic reset.
• Suction connection: G 1¼".
• Pump discharge connection: G 1".
• Pump weight: approximately 15.9 kg.
• Pump length: approximately 438 mm.

WATERCONTROL pressure controller features

• Operation: automatic start and stop according to demand.
• Dry-run protection: yes.
• Start pressure: 1.5 bar.
• Start pressure adjustment: no.
• Maximum pressure: 10 bar.
• Power supply: 230 V single-phase ±10%.
• Frequency: 50/60 Hz.
• Maximum current: 10 A.
• Maximum pump power: 1.1 kW.
• Maximum temperature: 60 °C.
• Protection: IP65.
• Pressure gauge: yes.
• Connection: 1".
• Operating indicator lights: yes.
• Reset button: yes.

Ebara pressure booster set for automatic water supply

The Ebara COMPACT BM/15G WATERCONTROL combines a 1.5 HP multistage pump with automatic electronic control, offering a compact solution for installations that need to increase pressure or distribute water from a tank.

Its hydraulic curve allows up to 7.2 m³/h, while the construction with a cast iron body, AISI 304 sleeve, and stainless steel shaft is designed to provide robustness in clean water applications. WATERCONTROL automates start and stop, includes a pressure gauge, and protects against dry running, simplifying daily use of the unit.

Thanks to its performance, it is especially suitable for domestic pressurization, single-family homes, garden irrigation, and other clean water supply applications that fall within its flow and pressure curve.