Easy Step-by-Step Guide to Installing a PVC Flushing Cistern

Installing a PVC flushing cistern might seem like a task for professionals, but with the right instructions and tools, you can handle it yourself. This guide breaks down the process into clear, manageable steps, making it accessible even if you have limited plumbing experience. Follow along with tips from R-Classic experts to ensure a smooth installation that saves time and money.

PVC flushing cistern positioned for installation in a bathroom corner

What You Need Before Starting

Before you begin, gather all necessary materials and tools. Having everything on hand will prevent interruptions and make the process more efficient.

Materials:

• PVC flushing cistern kit (including inlet valve, outlet valve, and fittings)

• PVC pipes and connectors

• Silicone sealant or plumber’s putty

• Mounting brackets or screws (usually included with the cistern)

• Flush handle or button

  
  

Tools:

• Adjustable wrench

• Screwdriver set

• Pipe cutter or hacksaw

• Spirit level

• Tape measure

• Pencil or marker

  
  

Make sure the water supply is turned off before you start working on the plumbing.

Step 1: Choose the Right Location

Select a spot for the cistern that is close to the toilet bowl and water supply. The cistern should be mounted securely on a wall or placed on a flat surface if it’s a floor-standing model.

• Ensure the location allows easy access for maintenance.

• Check that the wall or surface can support the cistern’s weight when full.

• Use a spirit level to mark a straight line for mounting.

  
  

Step 2: Prepare the Mounting Area

Mark the positions for the mounting brackets or screws based on the cistern’s mounting holes.

• Drill holes into the wall or surface where you marked.

• Insert wall plugs if mounting on drywall or masonry.

• Attach the mounting brackets or screws securely.

  
  

This step ensures the cistern will stay firmly in place during use.

Step 3: Connect the Water Supply

Attach the inlet valve to the water supply pipe.

• Cut the pipe to the correct length using a pipe cutter.

• Fit the inlet valve to the pipe, using PVC connectors if necessary.

• Tighten connections with an adjustable wrench but avoid overtightening to prevent damage.

• Use plumber’s tape on threaded connections to avoid leaks.

  
  

Turn on the water supply briefly to check for leaks before proceeding.

Step 4: Install the Outlet Valve and Flush Pipe

Connect the outlet valve to the flush pipe leading to the toilet bowl.

• Measure and cut the flush pipe to fit between the cistern and toilet.

• Attach the outlet valve to the cistern’s flush outlet.

• Connect the flush pipe securely to the outlet valve and toilet inlet.

• Seal joints with silicone sealant for a watertight fit.

  
  

Ensure the pipe is aligned properly to avoid strain on the connections.

Close-up of flush pipe attached to PVC flushing cistern outlet valve

Step 5: Attach the Flush Handle or Button

Most PVC flushing cisterns come with a flush handle or button.

• Follow the manufacturer’s instructions to install the flush mechanism.

• Connect the flush handle or button to the outlet valve’s lever.

• Test the flush mechanism to ensure it operates smoothly.

  
  

Adjust the lever if the flush is too weak or too strong.

Step 6: Test the Entire System

Once all connections are secure, test the flushing system.

• Fill the cistern by turning on the water supply fully.

• Allow the cistern to fill and check for leaks around all joints.

• Flush the toilet several times to confirm proper operation.

• Adjust the water level inside the cistern if necessary, using the inlet valve.

  
  

If you notice any leaks or malfunctions, tighten connections or reseal joints as needed.

Tips from R-Classic Experts

• Use quality PVC pipes and fittings to ensure durability.

• Avoid forcing connections; PVC parts should fit snugly but not require excessive force.

• Keep a bucket or towels handy to catch any water spills during installation.

• If unsure about any step, consult the cistern’s manual or seek advice from a professional plumber.

  
  

Final Thoughts

Installing a PVC flushing cistern yourself is a practical way to upgrade your bathroom plumbing without waiting for a technician. By following these clear steps and using the right tools, you can complete the installation efficiently and confidently. Take your time, check each connection carefully, and enjoy the satisfaction of a job well done.