Pump technology

Symptom: water leaking at the shaft (faulty mechanical seal)

How can I recognise it? Visible leakage or limescale between the motor and pump casing.
The cause: Dry running, wear or deposits have damaged the mechanical seal.
Risk: Leaking water can enter the motor bearing or winding, potentially causing complete motor failure.
Our solution: We replace the seal professionally, inspect the shaft surface and, where technically possible, check for leaks in a test run.

Symptom: insufficient pumping capacity

How can I recognise it? The pressure gauge reading falls, or the pump takes considerably longer to deliver the same volume.
The cause: Common causes include a worn impeller (cavitation or abrasion), a blocked suction inlet or an incorrect direction of motor rotation.
Our solution: We test performance, clean the system and repair or replace the impeller.

Symptom: unusually noisy pump (cavitation or bearings)

How can I recognise it? A crackling sound like gravel inside the pump, or a high-pitched screech.
The cause: Cavitation (vapour bubbles caused by unsuitable operating conditions) or early bearing damage.
Risk: Strong vibrations can quickly destroy mechanical components.
Our solution: We analyse the noise on site or in our workshop, optimise suction conditions and replace bearings to prevent more serious damage.

This is the key question whenever a fault occurs. We help you decide with a clearcost-effectiveness assessment:

Yes, if: The pump is integrated into complex pipework. Repair avoids costly modifications and adaptations to the existing system.

Yes, if: It is a high-quality branded pump (e.g. Grundfos, KSB or Jung) with an intact casing. Wear parts often cost only a fraction of a new pump.

Although we can repair almost anything, there are situations where replacing the pump makes better financial sense:

• Severe casing damage: When severe corrosion, frost damage (cracks) or extreme mechanical damage has compromised the structural integrity of the pump casing.
• Repair costs exceeding replacement value: When the cost of parts and labour for a standard small pump exceeds the price of a comparable modern replacement.
• Outdated technology & high electricity consumption: When your old pump is an energy dinosaur. Modern high-efficiency pumps often use up to 80% less energy, so electricity savings can quickly pay for a replacement.
• Unavailable spare parts: When safety-critical parts can no longer be sourced for an unbranded or particularly unusual model, and custom manufacture would be disproportionately expensive.

Honest advice is our standard: If repair does not make sense for you, we will tell you directly. We can then offer a suitable energy-efficient replacement pump. Transparency and partnership come first.