Mr. Clog Plumbing

Leaking & Running Toilet Repairs Sydney

Toilet running, constantly refilling, leaking at the base, flushing weakly or rocking when you sit on it? We find the worn part and fix it, and only recommend a new toilet when a repair won't last.

No surprise bills: $0 call-out and a fixed price before any work starts.

Our guarantee: 12 months on our workmanship, in writing. What it covers

Most toilet problems are one worn part, not a new toilet. We replace inlet valves and outlet (flush) valves, flush buttons, toilet seats and leaking pan connectors, and lift the toilet pan when the job needs it. When the porcelain is cracked or a repair isn't worth it, we replace the cistern or the whole toilet. You get a fixed price before we start, there is a $0 call-out fee, and our workmanship is covered for 12 months.

  • Running and constantly refilling toilets
  • Inlet and outlet (flush) valves replaced
  • Flush buttons replaced
  • Leaking pan connectors replaced
  • Toilet pans lifted when needed
  • Toilet seats replaced
  • Cracked toilets and cisterns replaced
  • $0 call-out fee
  • Fixed price quoted before we start
  • 12 months on our workmanship

Fixed price quoted before we start. $0 call-out fee.

Water trickling into the bowl, or a cistern that refills on its own every so often, is commonly a worn outlet (flush) valve seal or an inlet valve that won't shut off. Both are parts we replace.

Water around the base is often a leaking pan connector, the seal between the cistern and the pan, or the water supply connection. Sometimes it's condensation. We find which, and lift the pan if the connector needs replacing.

Often a cistern not filling to the right level or a worn flush valve. If the bowl drains slowly or keeps blocking, the problem may be in the drain, which our blocked toilet service covers.

A button that sticks, doesn't return, or has cracked can usually be replaced without changing the cistern.

A pan that moves can break its seal to the drain and start leaking, or crack over time. If the pan is undamaged, it can be re-fixed and resealed.

Cracked porcelain can't be reliably repaired and can split without warning. A cracked cistern or pan should be replaced.

A worn inlet valve, outlet valve, flush button, seat or pan connector. These are single parts, and the rest of the toilet can keep going for years.

Cracked porcelain, an old toilet whose parts are no longer made, or a toilet that keeps failing. If only the cistern is the problem, our cistern replacement page explains when the pan can stay.

When a new toilet is the better option, we remove the old one and install the new suite, with brands including Caroma and Laufen.

How It Works

01

We check the cistern, the flush, the pan and the connections to find what's worn or leaking.

02

You get a fixed price for the repair, or for a replacement if repair isn't worth it.

03

We replace the valve, button, seat or pan connector, lifting the pan if needed.

04

We run full and half flushes and check for leaks before we leave.

Common Questions

Usually a worn outlet (flush) valve seal letting water into the bowl, or an inlet valve that won't shut off. Both can be replaced, so it's normally a repair, not a new toilet.

Common causes are a leaking pan connector, the seal between the cistern and the pan, or the supply connection. Sometimes it's just condensation. We find the source, and lift the pan when the pan connector needs replacing.

If it's a worn valve, button, seat or pan connector, a repair usually makes sense. If the porcelain is cracked, or parts for an old model are no longer made, replacement is the better option. We'll tell you which before we start.

Yes. We replace flush buttons, toilet seats, inlet and outlet valves, and leaking pan connectors.

Yes. A weak flush is often a cistern not filling to the right level or a worn flush valve, both repairs. If the toilet is blocked or keeps blocking, we clear it and check the drain.

It depends on what's worn. We find the fault first and give you a fixed price before we start, with a $0 call-out fee.

from 35 Google reviews
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We recently used Mr Clog Plumbing for our granny flat in Guildford and couldn't be happier with the service. Everything was handled professionally from start to finish, with great communication and workmanship…
George A.Guildford · October 2026
Absolute legend. Turned up on time, sorted the problem quickly and didn’t charge a fortune. Super easy to deal with and cleaned up after the job too. Will definitely be using him again and would happily recomme…
Samantha M.May 2026
Turned up on time and honest service, couldn’t ask for much more.
Danny D.May 2026

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