How Difficult is it to Replace a Toilet Syphon?

Replacing a toilet syphon can be a tricky task, especially for those who aren’t experienced in plumbing. A toilet syphon is a vital component inside the cistern that controls the flushing mechanism. When it fails, the toilet may not flush properly or could keep running continuously, wasting water. While this issue can be frustrating, replacing the syphon is something a handy person can handle, provided they understand the process and challenges involved. Here’s a closer look at the difficulties of replacing a toilet syphon, and some tips to make the job easier.

1. Understanding What a Toilet Syphon Is

A toilet syphon is a plastic component located inside the cistern. When you flush, the syphon lifts a diaphragm or flap that allows water to rush into the toilet bowl, flushing away waste. Over time, syphons can wear out, crack, or develop faults in their diaphragm, leading to a loss of proper function. Common signs that your syphon needs replacement include a weak flush, double flushing, or water continuously running into the toilet bowl.

Replacing this part is necessary to restore your toilet’s normal operation, but it’s not always a straightforward task. It involves draining the cistern, removing the toilet’s cistern from the pan, and then installing the new syphon.

2. Challenges Involved in Replacing a Toilet Syphon

Replacing a toilet syphon presents several challenges that can make the job difficult, especially for beginners. Here are some of the common difficulties encountered:

a. Access to the Cistern

The biggest challenge when replacing a syphon is accessing the cistern. Depending on your toilet’s design, the cistern might be tightly fitted against the wall or enclosed in a cabinet. This can make reaching the bolts and fittings difficult, requiring special tools or additional dismantling.

Some modern toilets have concealed cisterns or are integrated with fitted furniture. In these cases, gaining access can involve removing parts of the bathroom furniture or cutting through silicone sealant, which adds time and complexity to the job.

b. Disconnecting the Water Supply and Draining the Cistern

To replace a syphon, you need to shut off the water supply to the toilet and drain the cistern completely. The shut-off valve may be hard to turn due to corrosion or may be in an awkward location, making it hard to access. Once the water supply is turned off, draining the cistern requires flushing and then mopping up any remaining water to prevent spillage.

This step can be a little messy and time-consuming, especially if there are mineral deposits or rust on the components that make them difficult to disassemble.

c. Removing the Old Syphon

Once the cistern is drained, you need to detach the cistern from the toilet pan. This usually involves unscrewing nuts and bolts at the base of the cistern and disconnecting the flush pipe and water inlet. Depending on the age of the toilet, these bolts can be rusty, corroded, or difficult to reach, which can make removal challenging. Special care is needed not to crack the porcelain or damage the seal between the cistern and the toilet.

After removing the cistern, the old syphon is typically held in place by a large plastic nut, which may be stiff or hard to loosen.

d. Installing the New Syphon and Reassembling the Toilet

Once the old syphon is out, installing the new one involves positioning it correctly, securing it with a retaining nut, and ensuring all seals and washers are in place. Reassembling the toilet can be tricky because the cistern must be positioned back onto the toilet pan with the correct alignment to prevent leaks.

All connections, including the flush pipe and water inlet, need to be securely tightened. Testing the new installation by turning the water back on and checking for leaks is an important step, as improper sealing can cause water to escape from the cistern.

3. Tools and Materials Needed

To replace a toilet syphon, you will need certain tools and materials, which may not be readily available in every household. Here’s a list of common items required:

• Adjustable spanner or wrench for removing bolts
• Screwdriver (flathead or Phillips, depending on the screws)
• Plumber’s putty or PTFE tape to seal connections
• Bucket or towels to catch any water
• Replacement syphon (make sure it’s compatible with your toilet model)
• New washers or seals (to ensure a proper fit and prevent leaks)
• Hacksaw (if the syphon needs to be cut to size)

Having the right tools and knowing how to use them is key to successfully replacing a toilet syphon.

4. Tips for Making the Job Easier

Although replacing a toilet syphon can be challenging, the following tips can help make the job easier and reduce the risk of mistakes:

a. Prepare Thoroughly

Before starting the job, make sure you have all the necessary tools and parts. Turn off the water supply and drain the cistern completely. Having a bucket or towels ready can help prevent water from spilling onto the bathroom floor.

b. Take Pictures

If you’re unfamiliar with the plumbing setup, take pictures of the existing setup before dismantling anything. This can help you remember how to reassemble the toilet correctly and identify where all the connections go.

c. Use Penetrating Oil on Rusty Bolts

If the bolts are corroded or hard to remove, applying a penetrating oil can help loosen them. Give it a few minutes to work before attempting to unscrew.

d. Replace All Washers and Seals

While the cistern is off, replace all washers, seals, and gaskets. This will help prevent leaks and ensure the new syphon works as efficiently as possible.

e. Test the Toilet Before Final Tightening

After installing the new syphon and reassembling the toilet, turn on the water and check for any leaks. Test the flushing mechanism to ensure the syphon is working properly. If everything looks good, proceed with final tightening of all bolts.

5. When to Call a Professional Plumber

If the idea of replacing the syphon sounds daunting or if you encounter complications during the job, it’s wise to call a professional plumber to repair your toilet. A qualified plumber has the tools and experience to handle any difficulties, including dealing with stubborn bolts, hard-to-reach cisterns, or unexpected leaks.

Hiring a plumber can save time and prevent potential damage to your toilet or bathroom. If the toilet is part of a more complex plumbing system, having a professional on hand ensures the work complies with local plumbing codes.

Conclusion

Replacing a toilet syphon can be a challenging task that involves several steps, from disconnecting the water supply to reassembling the toilet. It requires some plumbing knowledge, the right tools, and a bit of patience. While many homeowners can handle the task themselves, it can become difficult when faced with corroded fittings, inaccessible parts, or tricky installations.

By being prepared and following the right steps, you can overcome these challenges and successfully replace your toilet syphon. However, when in doubt, don’t hesitate to call a professional plumber in Milton Keynes to ensure the job is done right. Check out our google reviews