2.5" STM 31 - submersible pump
The IBO 2.5" STM submersible pump is a multistage design with enhanced sand resistance, intended to supply water to single- and multi-family homes, farms, and irrigation systems. Its small diameter allows installation in narrow boreholes, while the factory-fitted 20 m cable eliminates the need for an extension cable 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 suitable for supplying irrigation and watering systems on smaller plots.
-
Farms with lower water needs – floating impellers and enhanced sand resistance ensure reliable operation in more challenging water intakes.
Applications
The 2.5" STM series is designed to pump clean raw water from narrow, drilled deep wells for single- and multi-family homes, farms, and irrigation and drainage systems.
The pumps operate vertically in wells with a minimum internal diameter of 75 mm, at 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
2.5" STM series pumps have a brass suction and discharge body, a casing, 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 start box, while thermal protection built into the winding protects the motor from 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 start 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 body – brass, housing/shaft/rotor – AISI 304 stainless steel, impeller and diffuser – PPO polymer, mechanical seal – SiC/SiC/NBR
IBO – 24-month (2-year) manufacturer's warranty. Warranty and post-warranty service is provided by Dambat.
Dambat – a trusted manufacturer of pumps and water engineering 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 into. It's worth measuring the actual well diameter before buying.
Does the 2.5" STM pump require an external start box?
No. The capacitor is built into the motor, so the pump does not require an external start box, making installation easier.
What is the difference between the 2.5" STM and the 3" STM?
Both series have a similar material construction – brass suction and discharge bodies, AISI 304 stainless steel housings, shafts, and rotors, and PPO polymer impellers and diffusers. They differ primarily 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, for wells from 85 mm in diameter) delivers 100 l/min. The choice depends mainly on the well's available diameter and the required amount of water.
How do I choose the right 2.5" STM pump model for my needs?
The right model depends on the well depth and water demand – both models have the same flow rate of 45 l/min, but differ in their pumping 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 to customers. 2.5" STM series pumps are available from commercial partners, plumbing wholesalers, and authorized online distributors.
What are the warranty terms for the 2.5" STM pump?
IBO – 24-month (2-year) manufacturer's warranty. Warranty and post-warranty service is provided by Dambat.
