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DIY Plumbing: A Comprehensive Guide to Replacing a Toilet Cistern

Table of Contents:

1. Introduction

2. Identifying the Need to Replace Your Cistern

3. Tools You Need For a Cistern Replacement

4. A Step-by-step Guide to Replacing Your Toilet Cistern

5. Safety Measures When Replacing Your Cistern

6. When to Call a Professional Plumber

7. Conclusion


With the right tools and a bit of patience, anyone can tackle basic plumbing tasks like replacing a toilet cistern. This comprehensive guide will walk you through each step of the process, providing you with the know-how to get the job done right.

Identifying the Need to Replace Your Cistern:

The first step in any DIY plumbing project is identifying the problem. In the case of a toilet cistern, common issues that may necessitate a replacement include continuous water flow into the bowl, leaks, or a cistern that doesn't refill properly.

Tools You Need For a Cistern Replacement:

Before you dive headfirst into this task, make sure you're armed with the right tools. You'll need an adjustable wrench, a screwdriver, a sponge, towels, and the new cistern. Don't forget a pair of gloves for hygiene purposes!

A Step-by-step Guide to Replacing Your Toilet Cistern:

1. Turn off the water supply to the toilet by closing the stop tap.

2. Flush the toilet to drain water from the cistern.

3. Use an adjustable wrench to disconnect the water supply line from the cistern.

4. Unscrew the cistern from its base.

5. Remove the old cistern.

6. Place the new cistern on the base and secure it with screws.

7. Reconnect the water supply line to the cistern.

8. Turn on the water to refill the cistern. Check for any leaks.

Safety Measures When Replacing Your Cistern:

Remember, safety is paramount when undertaking any DIY task. Always turn off the water supply before starting work. Be aware of the potential for leaks and take precautions to mitigate water damage, such as laying down towels.

When to Call a Professional Plumber:

While many may find this a manageable task, there are situations when it's best to call in a professional. If you're uncomfortable with the process or encounter complications like stubborn bolts or major leaks, don't hesitate to call a professional plumber.


Replacing a toilet cistern is a relatively straightforward task that many homeowners can accomplish on their own. However, remember that professional plumbers are always available to help with more complex issues or in case of any uncertainties.


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