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Dubai HillsVilla Maintenance

Emergency response

Booster pump running with an empty tank

After a supply interruption or heavy use, the tank runs low and the booster pump keeps running — getting hot, noisy or losing prime — instead of stopping. Pressure at taps drops to nothing.

Water Tanks

Normally scheduled work. Overflow and total supply failure are handled as urgent.

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01LIKELY CAUSES

What usually sits behind this symptom, and what tells one cause from another.

  • Low-level float switch stuck or failed

    Switch does not change state when lifted and lowered.

  • Switch wiring damaged

    Continuity test on the switch cable.

  • No dry-run protection fitted

    Pump control panel checked; protection absent.

02BEFORE ANYONE VISITS

What you can safely check.

  • Switch the pump off at its isolator if the tank is empty.
  • Check whether the tank is refilling.
  • Listen for the pump running with no water flow.
  • Do not run the pump repeatedly to test it.

03WHAT WE MEASURE

We test the level switch in the tank, the wiring to the pump control and the controller’s dry-run setting. We also check the pump for heat damage before returning it to service.

04IN A VILLA

Villas rely on a booster pump between the tank and every tap upstairs, and a supply interruption overnight can empty a tank before anyone wakes. Without working dry-run protection, the pump keeps trying to deliver water it does not have and runs until it overheats or its seal fails.

05THE FIX

Which repair, and when.

A pump running dry overheats and damages its seals and motor quickly.

  1. Replace the level switch

    It has failed.

  2. Repair the wiring

    The cable is damaged.

  3. Fit dry-run protection

    None is present.

06Typical villa tank service

AED 450 – 1,100 depending on size and access

Driven mainly by tank volume, number of tanks and how difficult the access is. Float valve and inlet repairs are usually a separate, much smaller item and are quoted at inspection.

07QUESTIONS

Has the pump been damaged?
It depends how long it ran dry; we check it before restarting.
Why did the tank empty?
Supply interruptions or a stuck inlet can cause it.
Can protection be added?
Yes, to most pump installations.
What should I do in a supply cut?
If the tank is low, switch the booster pump off until the supply returns and the tank refills.

08RELATED

All water tanks faults — 12 more on this system

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