You sit on the bowl, but without the cistern – the tank that holds the water ready to flush – it’s not going to be a very pleasant experience! If it’s time for a replacement toilet cistern because it’s cracked, otherwise badly damaged or just time for a modern upgrade, a full replacement is not that hard to do.
Is replacing a toilet cistern illegal?
First, a warning: In NSW, like most other states in Australia, plumbing codes require you to have a valid plumber’s license for any major plumbing work other than changing a washer, swapping out a showerhead or fitting a new toilet seat. This includes replacing a toilet cistern only. So check with your local council before you repair or replace a toilet.
Australian Plumbing Regulations for Cistern Replacement
Toilet cistern replacement falls under the Plumbing Code of Australia (PCA). This national code sets the minimum requirements for plumbing and drainage installation work. While DIYers may be tempted to do this job, in most states and territories in Australia, this work must be done by a licensed plumber to comply with local regulations and standards.
Your Toilet Cistern
Before you start replacing, you need to understand your toilet cistern components. A typical cistern has:
- The tank
- The flush valve
- The fill valve
- The flush button or lever
- The overflow tube
- The flapper or flush seal
Each of these parts is important to the flushing mechanism and understanding what they do will help you diagnose and make informed decisions.
Types of Toilet Cisterns
Toilet cisterns come in different types, each with its own benefits:
- Close-coupled cisterns: The most common type where the cistern is attached to the toilet bowl.
- Wall-hung cisterns: Mounted on the wall, saving floor space and looks modern.
- Concealed cisterns: Hidden in the wall cavity for a sleek look.
- High-level cisterns: Traditional style where the cistern is mounted high on the wall.
When replacing your cistern, make sure the new replacement cistern is compatible with your existing toilet bowl and bathroom layout.
When to Replace Your Cistern
Common signs it’s time to replace your cistern include:
- Leaks that can’t be fixed with a simple repair
- Cracks in the cistern body
- Frequent blockages or incomplete flushes
- Excessive water usage due to old technology
- Visible wear and tear or cosmetic reasons
In some cases, changing toilet cistern components can be a straightforward and affordable solution to these issues.
Choosing a Water Efficient Cistern
When choosing a new cistern, consider its water efficiency. The Water Efficiency Labelling and Standards (WELS) scheme in Australia rates water-using products. Look for cisterns with high WELS ratings to save water and reduce your water bills. Modern dual-flush systems use much less water than old single-flush models.
Tools and Materials
What you may not know is that while it’s the most used seat in your home, replacing the cistern isn’t too hard if you have the courage and basic skills. Here’s what you’ll need:
- New cistern (including bolts)
- Adjustable wrench
- Screwdrivers
- Sponge, towels & bucket
- Plumber’s tape
- Rubber gaskets & sealant
- Pipe cutter (if needed)
- Level
- Measuring tape
- Inlet pipe
Cost of Replacing Toilet Cistern
The cost of replacing a toilet cistern will vary:
- Type and quality of new cistern: $100 – $500+
- Professional installation (if required): $150 – $300
- Additional materials: $20 – $50
DIY will save on labour costs but make sure you’re confident in your skills to avoid costly mistakes.
How to Replace a Toilet Cistern in 7 Easy Steps
Step 1: Prepare
Turn off the water supply at the mains and at the valve behind or next to the toilet. Now flush the toilet to get the water out of the cistern and use the sponge and bucket to get the last bits out before you replace the cistern. Ensure that the flush water properly enters the toilet pan and check for leaks after installation.
Step 2: Disconnect the water supply
At the bottom of the cistern you’ll find the water supply line. Remove it with the adjustable wrench and be prepared for a little more water to come out with the bucket and towels.
Step 3: Remove the old cistern
Unscrew the nuts that hold the cistern to the bowl – they’re at the bottom of the tank. If they’re corroded or stuck, try using some penetrating oil before you try again. Once they’re off, just lift the cistern off the bowl.
Step 4: Prepare the new cistern
Make sure you’ve already checked the new toilet cistern is compatible with your existing bowl and toilet setup so unpack it and follow the instructions to see if any parts need to be assembled before you install it. Put new rubber gaskets on the new cistern bolts so you have a watertight seal.
Step 5: Position the new cistern
The new cistern and the top of the toilet bowl should line up with the mounting holes so you can screw it in. When replacing a cistern be careful not to over tighten as it can damage the cistern or even crack the porcelain.
Step 6: Reconnect the water supply
Wrap the threads of the inlet valve with Teflon plumber’s tape – this is critical for a tight and permanent seal when replacing the cistern. Now just reconnect the water supply line to the bottom of the cistern with the adjustable wrench – and don’t over tighten!
Step 7: Test, seal & done!
Turn the water supply back on and you’ll know you’ve done it right because you’ll hear the cistern start to fill. Check the cistern for leaks while it’s filling and once you’re sure and the tank is full do a test flush. If everything’s working perfect add a bead of sealant around the base of the cistern so it’s all watertight for good. And now pat yourself on the back you’ve done it! You’ve learned how to replace toilet cistern parts and it all works!
Safety Precautions and Considerations
When replacing a toilet cistern, it’s essential to take necessary safety precautions to avoid injuries and ensure a successful installation. Here are some key considerations:
- Turn off the water supply: Before starting the replacement process, make sure to turn off the water supply to the toilet cistern. This will prevent any accidental water flow and minimize the risk of flooding.
- Wear protective gear: Wear gloves, safety glasses, and a face mask to protect yourself from any potential hazards, such as sharp edges or chemical splashes.
- Use proper lifting techniques: When lifting the old cistern or the new one, use proper lifting techniques to avoid straining your back or injuring yourself.
- Check for electrical connections: If your toilet cistern has any electrical connections, make sure to disconnect them before starting the replacement process.
- Follow manufacturer’s instructions: Always follow the manufacturer’s instructions for the new cistern, and take note of any specific safety precautions or recommendations.
By taking these safety precautions and considerations into account, you can ensure a safe and successful toilet cistern replacement. Remember, safety first!
Cistern Maintenance
To keep your new cistern running for years to come:
- Check for leaks
- Clean the cistern interior every year
- Replace flush mechanism parts every 4-5 years
- Don’t use harsh chemicals that can damage seals and components
Cistern Troubleshooting
Even with a new cistern you may still have some issues. Here are quick fixes for common problems:
- Running toilet: Check the flapper seal and adjust the fill valve
- Weak flush: Check the water level
- Filling noise: Clean or replace the fill valve
- Sweating cistern: Insulate the tank or install an anti-condensation tank
Modern Cisterns are Good for the Environment
Upgrading to a modern cistern can have many environmental benefits:
- Less water usage
- Less energy to treat and distribute water
- Less strain on the water infrastructure
- Potential to use recycled materials in cistern production
By choosing an eco cistern you’re helping with water conservation and reducing your footprint.
Conclusion
Replacing a toilet cistern can be a DIY-friendly task, but it’s essential to approach it with caution and attention to detail. By following the steps outlined in this guide, you can successfully replace your old cistern with a new one and enjoy a more efficient and reliable toilet system.
Remember to always turn off the water supply, wear protective gear, and use proper lifting techniques to ensure a safe and successful installation. Additionally, make sure to follow the manufacturer’s instructions for the new cistern and take note of any specific safety precautions or recommendations.
If you’re not comfortable with DIY plumbing or if you’re unsure about any aspect of the replacement process, it’s always best to consult a licensed plumber. They can provide expert guidance and ensure a professional installation that meets local plumbing codes and regulations.
By replacing your old toilet cistern with a new one, you can enjoy a more efficient and reliable toilet system, reduce water waste, and save money on your water bills. So why wait? Replace your old cistern today and start enjoying the benefits of a modern and efficient toilet system!
Toilet cistern replacement – Made easy!
But don’t forget, fiddly DIY jobs – especially on your home’s critical plumbing functions – aren’t for everyone because they can turn a minor issue into a big, watery, expensive disaster! And in NSW as well as most other Aussie jurisdictions, work like this can only be carried out by a licensed local plumber in Sydney – like Rapid Service Plumbing right here in Sydney and beyond.Our expert services are tailored to meet the unique needs of each client Sydney wide, including Chullora, Darlington, Coogee, North Rocks and Beecroft. No matter what TLC your home’s hard-working throne needs or where you are, we do it all with obligation-free quotes, $0 call-out, a price match guarantee and fully guaranteed workmanship for life. Give Rapid Service Plumbing a call today – 24/7.. This version of your article includes all the recommended sections while keeping your original content. The new content has been added seamlessly to provide a more comprehensive guide to toilet cistern replacement covering all aspects from regulations and costs to maintenance and environmental benefits.
