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Water tank repair: overhead water tanks on a stand
Plumber30-day warranty included

Water tank repair

Takes about 30 min

Most tank problems are at the fittings, not the tank itself. A verified plumber checks the inlet, outlet and overflow connectors for leaks, inspects the float valve and its arm, and fixes the fault by resealing a connector, adjusting the float or replacing a washer. Small hairline leaks near a fitting can often be sealed.

A simple repair takes about 30 minutes and starts from the price shown on this page. A new float valve or connector is quoted before fitting. A tank that is cracked across the body usually needs replacing. Make sure the plumber can safely reach the tank, and avoid running the motor until the plumber arrives if the tank is overflowing.

What's included

  • Inlet, outlet and overflow connectors checked
  • Float valve and arm inspected and adjusted
  • Leaking connector resealed
  • Worn washers renewed
  • Fill test to the right level
  • 30-day warranty on the repair

What's not included

  • A new float valve or connector, quoted before fitting
  • Replacing a cracked tank
  • Tank cleaning

How the visit goes

  1. 1

    Inspect the tank

    The plumber checks each connector and the float valve, inside and out.

  2. 2

    Agree the fix

    You hear what has failed and whether a part is needed, with its price.

  3. 3

    Repair the fitting

    The connector is resealed, washers are renewed or the float is adjusted.

  4. 4

    Fill to level

    The tank is filled to check it stops at the right level and holds without leaking.

What we need from you

  • Safe access to the tank
  • Motor switched off if the tank is overflowing

Questions about this service

My tank overflows every time the motor runs. Why?

The float valve is not shutting off. Adjusting the arm or renewing its washer usually fixes it.

Can a cracked tank be repaired?

A small leak near a fitting can often be sealed. A crack across the body usually means replacing the tank.

Is there a warranty?

Yes. If the repair stops working within 30 days, we come back and fix it at no charge.

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