The first step in installing a Geberit cistern is to ensure the installation area is ready. Geberit cisterns are generally installed inside a false wall or behind a stud wall. If you’re retrofitting a cistern, you may need to cut into the existing wall.

 

Read until the end to learn how to install Geberit cistern. 

• Measure the space: Use a measuring tape to determine the dimensions of the cistern and the space behind the wall. Ensure the wall is sturdy and level, as this will be critical to ensure the cistern sits properly.

• Check plumbing connections: Ensure that the cold-water supply pipe is located where it can connect to the cistern. You may need to install a shut-off valve if there isn't one already.

• Drill the necessary holes: Mark the spots where you’ll need to drill to attach the cistern to the wall or frame. This will typically include fixing points for the cistern itself and any plumbing connections. Make sure to drill correctly sized holes for the fixings and use a level to ensure everything aligns properly.

Mounting the Cistern Frame

Geberit cisterns come with a pre-assembled frame that needs to be secured in place. Follow the manufacturer’s guidelines for the specific model you're installing.

• Position the frame: Carefully position the cistern frame inside the wall or behind the stud wall. If you're using a false wall, ensure there is adequate space for the frame and cistern, while leaving room for the toilet and flush plate.

• Fix the frame to the wall: Using the drilled holes, attach the frame securely to the wall with the appropriate screws and wall plugs. It’s important that the frame is properly secured to prevent any shifting or instability after installation. Use a level to make sure the frame is perfectly vertical and horizontal.

• Secure the frame’s feet (if applicable): Some models include adjustable feet that allow you to set the height of the cistern. Use the adjustable spanner to tighten the feet and ensure they are firmly in place.

Installing the Water Supply Connection

Now it’s time to connect the water supply to the cistern. The Geberit cistern will have an inlet valve, typically located at the bottom of the unit.

• Attach the water supply pipe: Use a pipe cutter to trim the water supply pipe to the correct length, ensuring it reaches the cistern’s inlet valve. Attach the pipe to the inlet valve using a wrench or adjustable spanner. If necessary, use a sealing tape or thread sealant to prevent leaks.

• Test the water supply connection: Once everything is connected, turn the water supply back on and check for leaks. Make sure the connection is secure and that water is flowing freely into the cistern.

 

• Click here to buy: Geberit Sigma8-F in Wall Cistern

 

Installing the Toilet Pan

With the cistern frame in place, the next step is to install the toilet pan that will be connected to the cistern.

• Position the toilet pan: Place the toilet pan over the soil pipe, ensuring that the pan is correctly aligned with the cistern. The pan should be positioned close to the cistern frame, leaving enough room for the flush pipe to connect.

• Secure the pan to the floor: Once aligned, mark the spots where the toilet pan will be secured. Drill holes into the floor and insert the fixing screws or bolts. Attach the pan to the floor securely, making sure it's stable and level.

Connecting the Flush Pipe

The flush pipe is an essential part of the installation of any toilets, as it connects the cistern to the toilet pan.

• Install the flush pipe: The flush pipe is typically attached to the cistern at the side or back. Once you have positioned the cistern and pan correctly, connect the flush pipe to the cistern and the toilet pan. Use silicone sealant on the pipe connections to ensure a watertight seal.

• Check for leaks: Turn on the water supply and check the connections to make sure everything is sealed properly. Operate the flush mechanism to ensure the flush pipe is working correctly and water is flowing properly.

Installing the Flush Mechanism and Plate

After ensuring all plumbing connections are secure, you can now install the flush mechanism and the flush plate.

• Install the flush mechanism: Follow the manufacturer’s instructions to install the flush mechanism inside the cistern. This typically involves attaching the button or lever system to the flush valve inside the cistern. Make sure the mechanism is securely in place and working smoothly.

Attach the flush plate: Once the flush mechanism is in place, attach the flush plate to the front of the cistern. The plate is typically mounted onto the frame with screws or clips. Check that the flush plate sits flush against the wall and operates smoothly.

Here is an YouTube video from Geberit Australia on the Sigma8 In wall Installation

• 
  

Final Checks and Testing

With everything in place, it’s time to test your installation.

• Test the flush: Turn on the water supply and test the flush system from the toilet suite. Check that water is filling the cistern, the flush mechanism works, and there are no leaks.

• Check for leaks: Inspect all connections, including the water supply, flush pipe, and toilet pan, to ensure there are no leaks. Tighten any loose connections if necessary.

Installing a Geberit cistern may seem like a daunting task, but by following these steps and taking your time, you can achieve a professional result. Proper installation is key to ensuring that the cistern works efficiently and the toilet operates smoothly for years to come.

By paying attention to detail and checking all connections, you’ll enjoy a modern, high-performance toilet that enhances the functionality and design of your bathroom.

f you have any doubts or need help along the way, don’t hesitate to reach out to a professional plumber for assistance. 

Leave a comment

Leave a comment

Name*

Email*

Comment*

Send

• Share on:
• WhatsApp
• Deel
• Tweet
• Pin it
• Messenger
• Email

---