Leaking Hot Water Cylinder Emergency Guide

Stay Calm. Protect Your Home.

A leaking hot water cylinder can quickly cause water damage and may indicate a fault that requires professional attention.

This guide explains how to make the situation safe, reduce water damage and know when to call a qualified plumber.

Step-by-Step Guide

Step 1 – Turn Off the Water Supply

If it is safe to do so, turn off the water supply to the hot water cylinder. If you are unsure, turn off your property's main stop valve.

Step 2 – Contain the Water

Place towels, buckets or FloodFort flood bags around the leak to help prevent water spreading across the floor.

Protect nearby flooring, cupboards and belongings where possible.

Step 3 – Check for Obvious Leaks

Look for water leaking from valves, pipe connections or the cylinder itself.

Do not attempt to dismantle or repair the cylinder.

Step 4 – Reduce Further Damage

Move nearby belongings to a safe, dry area and dry standing water as quickly as possible.

If water is leaking through the ceiling below, keep people away from the affected area.

Step 5 – Contact a Qualified Plumber

Arrange for a qualified plumber to inspect and repair the hot water cylinder before using it again.

FloodFort Tip

Keep your FloodFort Kit somewhere easy to access so you can respond quickly to unexpected water emergencies.

Using FloodFort flood bags early can help minimise water damage while you wait for repairs.

Need More Help?

If the hot water cylinder is leaking heavily or you cannot stop the water supply, contact an emergency plumber immediately.

If water has reached electrical wiring or fittings, switch off the electricity at the consumer unit if it is safe to do so.