2.5" STM 24- submersible pump
The IBO 2.5" STM submersible pump is a multistage design with enhanced sand resistance, intended to supply water to single-family and multi-family homes, farms, and irrigation systems. Its small diameter allows installation in narrow boreholes, and the factory-fitted 20 m cable means no additional cable extension is needed at typical installation depths.
Who it’s for
-
Single-family homeowners – the small 66 mm diameter allows the pump to be installed in very narrow wells.
-
Allotment gardeners and horticulturists – the compact design is ideal for supplying irrigation and watering systems on smaller plots.
-
Farms with lower water requirements – floating impellers and enhanced sand resistance ensure reliable operation in more challenging water intakes.
Applications
The 2.5" STM series is designed to draw clean raw water from narrow, drilled deep-water wells for use in single-family and multi-family homes, farms, and irrigation and drainage systems.
The pumps operate vertically in wells with a minimum internal diameter of 75 mm and a maximum pumped water temperature of 35°C. The 2.5" STM 230 V submersible pump works with standard pressure tanks and pressure control systems.
Features of the 2.5" STM series
The 2.5" STM series pumps have a brass suction and discharge body, a housing, shaft and rotor made of AISI 304 stainless steel, and an impeller and diffuser made of PPO polymer. Enhanced sand resistance and floating impellers ensure reliable operation even in more challenging water intake conditions.
The capacitor built into the motor eliminates the need for an external starter box, while the thermal protection built into the winding protects the motor against overload.
- Pump type: multistage, submersible, with enhanced sand resistance
- Diameter: 66 mm (2.5")
- Minimum well diameter: 75 mm
- Power supply: 230 V (single-phase)
- Capacitor: built into the motor – no external starter box required
- Power cable length: 2 m
- Protection rating: IP68
- Insulation class: B
- Operating mode: continuous
- Operating position: vertical
- Max. liquid temperature: 35°C
- Max. immersion depth: 100 m
- Rotational speed: 2850 rpm
- Materials: suction and discharge housing - brass, casing/shaft/rotor - AISI 304 stainless steel, impeller and diffuser - PPO polymer, mechanical seal - SiC/SiC/NBR
IBO - 24 months (2 years) manufacturer's warranty. Dambat provides warranty and post-warranty service.
Dambat - a trusted manufacturer of pumps and hydrotechnical equipment with quality certifications.
Frequently asked questions (FAQ) - 2.5" STM submersible pump
What type of well is the 2.5" STM submersible pump suitable for?
The pump is designed for wells with a minimum internal diameter of 75 mm, allowing it to be installed in very narrow boreholes that most submersible pumps cannot fit. It's a good idea to measure the actual well diameter before purchasing.
Does the 2.5" STM pump require an external starting box?
No. The capacitor is built into the motor, so the pump does not require an external starting box - making installation easier.
What is the difference between the 2.5" STM and the 3" STM?
Both series have similar material construction - brass suction and discharge housings, a casing, shaft, and rotor made of AISI 304 stainless steel, and PPO polymer impellers and diffusers. They differ mainly in size and flow rate: the 2.5" STM has a diameter of 66 mm and fits wells from 75 mm in diameter, delivering 45 l/min, while the 3" STM (75 mm, wells from 85 mm) delivers 100 l/min. Your choice depends mainly on the available well diameter and the amount of water required.
How do I choose a 2.5" STM pump model to suit my needs?
The model you choose depends on the well depth and water demand - both models have the same flow rate of 45 l/min, but differ in head height (STM 24 up to 66 m, STM 31 up to 85 m). W If you have any questions, please contact our technical department.
Where can I buy a 2.5" STM submersible pump?
Dambat does not sell directly. 2.5" STM series pumps are available from retail partners, plumbing supply wholesalers, and authorized online distributors.
What are the warranty terms for the 2.5" STM pump?
IBO - 24 months (2 years) manufacturer's warranty. Dambat provides warranty and post-warranty service.
