Menu

Call This Saturday Get $50 Off Today

How to Replace a Toilet Siphon

How to Replace a Toilet Siphon

When your toilet no longer flushes properly, it is possible that the siphon or its diaphragm has gone…

Aug 19, 2020

When your toilet no longer flushes properly, it is possible that the siphon or its diaphragm has gone through wear and tear. In most cases, you would have to replace the entire toilet siphon to fix the problem. How you do this depends on the type of toilet that you have – close coupled or separate cistern and pan.

How to Replace a Toilet Siphon

Replacing The Siphon In a Close-Coupled Toilet

This process involves more work since you need to detach the cistern from the wall completely, so you can reach the plastic nut that holds the siphon in place.

How To Replace a Siphon In a Separate Cistern And Pan

This process is the more straightforward of the two, so you should get the job done without breaking a lot of sweat.

Before doing any repairs on both types of toilet, it is important to turn off the water supply and empty the cistern. Flush the toilet until all stored water has gone down the drain. If needed, use a sponge to remove the remaining water. This is done to minimize mess while fixing your toilet.

Signs That Your Toilet Might Need Fixing, Including a Siphon Replacement

How Much Does It Cost To Replace The Siphon?

If you have confidence in your handyman skills, buying parts is a lot cheaper than with labor cost combined. But even if you hire a plumber, replacing a siphon shouldn’t cost much. So, if a plumber charges you with exorbitant rates, look for other service providers.

Our Services

Plumbing Services

Faucets & Kitchen Sink

A kitchen stays busy all day. When something slows down the flow of…

Camera Inspection

A good look inside a drain line tells you the truth faster than…

Sewer Repair

A sewer line problem interrupts daily life quickly. Rooter Guard sees this…

Repiping

A plumbing system reaches a point where repairs stop making sense. Many homeowners…

Garbage Disposal Replacement

A dead disposal can bring a busy kitchen to a stop. When that…

Call U Now 818-351-1810

Recent Blog & Blog Post

Blog Oct 10, 2026

Why Recurring Main Line Clogs Mean It’s Time to Move Beyond Standard Service

Standard plumbing snakes often provide only a temporary fix by punching a narrow hole through a blockage (without addressing the root cause). Moreover, recurring main line clogs usually point to deeper issues like heavy grease buildup, tree root intrusion, or structurally damaged pipes that standard tools simply cannot resolve. To…

Learn More