Toilet keeps running?
A toilet that keeps running or refills every few minutes can waste hundreds of litres a day — and pushes up your water bill if you're metered.
It's almost always a worn flush valve seal or a fill valve that won't shut off.
Try this first — free
Checks you can safely do yourself
Look inside the cistern
If water is running over the top of the overflow pipe, the fill valve isn't shutting off. Try bending the float arm down slightly.
Tissue test
Dry the back of the bowl, then hold toilet tissue there. If it gets wet, the flush valve seal is leaking.
Check the float
Make sure the float isn't catching on the side of the cistern or the flush mechanism.
Turn it off for now
Turn the isolation valve on the supply pipe to stop the water until it's repaired.
If that didn't fix it
What it usually is — and what it costs
Worn flush valve washer
Water trickles into the bowl constantly
£95–£140
Faulty fill valve
Cistern overflows or keeps refilling
£110–£160
Complete cistern internals renewed
Fill valve and flush valve both worn
£160–£220
Prices inc VAT, parts and labour. We confirm the price before any work starts.
If water is coming out of the overflow pipe outside, turn off the isolation valve and give us a call.
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Frequently asked questions
Is a running toilet urgent?
It isn't dangerous, but it can waste up to 400 litres a day. Worth fixing within a few days.
How long does the repair take?
Usually under an hour, with parts from the van.
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All toilet repairs & prices
Fixed prices for every toilet job we do.