Domestic waterworks with submersible pump 3" STM 28 / 100l - RTS

Product detailed description

This domestic water supply system with submersible pump 3' STM 28 is commonly installed in private homes, cottages, schools and agricultural buildings where a reliable water source is needed from deep wells or boreholes. The system is designed for use in environments where water sources contain abrasive particles such as sand. Installers typically encounter scenarios involving new or freshly drilled wells where water quality is not yet fully stabilised. The system integrates a submersible pump, pressure tank and control components to provide continuous water supply under variable demand conditions.

The system is suitable for installation in both new and existing infrastructure where water is drawn from depths exceeding standard shallow well requirements. The inclusion of a 100 L pressure tank ensures stable water delivery without the need for separate pressure vessel selection. The pump operates with a single-phase power supply and is configured for direct integration into standard household water distribution systems. The system is particularly suited for applications requiring robust performance in the presence of particulate matter in the water.

Technical parameters

EAN	8585054501878
Length of supply cable (m)	20
Maximum flow rate (l/min)	100
Pump voltage (V)	230 V
Dimensions H x W x D (cm)	173 x 7.62
Pump head (m)	108
Weight	34.55 kg
Code	PR_40042
Brand	AQUA OLA

The maximum flow rate of 100 l/min indicates the system's capacity to meet average household or small commercial demand. The pump head of 108 m determines the vertical lift capability, which is essential for deep well applications. The 20 m cable length provides flexibility in positioning the pump within the well. The pressure tank size of 100 L ensures consistent water pressure during periods of fluctuating usage. These parameters are critical for determining the suitability of the system for specific well depths and required flow rates.Installation and connection The installation process begins with preparing the well casing and ensuring the internal diameter allows for the pump’s dimensions. The pump is lowered into the well using the supplied suspension kit, which is integrated into the 20 m cable. The pressure tank must be mounted in a location accessible for maintenance and inspection. The inlet and outlet connections are 1 inch nominal pipe size, with adapters included for 5/4 inch to 1 inch transitions. A check valve is installed to prevent backflow when the pump is inactive. The pressure switch must be calibrated according to the tank’s operational range. Common installation errors include incorrect cable routing, failure to secure the pump suspension, and improper alignment of the pressure tank with the water distribution network. Always verify the integrity of all seals and ensure the pump is fully submerged before energising the system.

Compatibility and accessories

The system is compatible with standard domestic water distribution networks and requires no additional filtration if the water quality is within acceptable limits. The included pressure tank eliminates the need to separately select upright or horizontal models. Additional accessories such as expansion vessels or secondary filters may be necessary depending on the water source characteristics. The system is designed for use with 230 V single-phase power supplies and does not require special electrical infrastructure. Related products such as pressure gauges, isolation valves or additional control modules may be required for custom configurations.

Technical background for designers

The submersible pump operates on a centrifugal principle, using an electric motor to drive the impeller. The floating impeller design allows the blades to adjust to particulate content in the water, reducing wear from abrasive materials. The pump body is constructed from durable materials suitable for prolonged submersion in water. The system integrates into a closed-loop water supply network, where the pressure tank maintains consistent pressure without constant pump operation. The service life of the system is influenced by the frequency of particulate exposure, the stability of the power supply and the regularity of maintenance checks. The pressure tank’s capacity and the pump’s flow rate determine the system’s ability to handle peak demand without excessive cycling.

Service and operation

Routine service involves inspecting the pump cable for damage, verifying the integrity of the pressure tank and checking the pressure switch calibration. The check valve should be tested periodically to ensure it prevents backflow. The system does not require scheduled service intervals beyond these basic checks. Any unusual noise, reduced flow rate or pressure fluctuations should prompt a detailed inspection. The pump must be removed for cleaning or replacement if significant particulate accumulation is observed. The pressure tank should be drained and inspected for internal corrosion if the water contains high mineral content.

Frequently asked questions

Can the pump be used in newly drilled wells?
Yes, the floating impeller design allows the pump to handle water with higher particulate content often found in new wells.

Is the pressure tank included in the set?
Yes, the set includes a 100 L upright or horizontal pressure tank with a built-in pressure gauge.

What connection sizes are used for the pump and tank?
The pump uses 1 inch connections, with adapters provided for 5/4 inch to 1 inch transitions.

Can the pump operate with a 230 V supply?
Yes, the pump is rated for 230 V single-phase operation and does not require a three-phase supply.