A toilet that keeps running (or randomly refills itself) is one of the most common — and most wasteful — plumbing problems. The good news: most causes are simple and cheap. Here's the rundown.
What it's costing you
A steadily running toilet can waste hundreds of gallons a day. That's real money on your San Diego water bill, month after month, for a part that often costs a few dollars.
The usual causes
1. A worn flapper (most common)
The rubber flapper at the bottom of the tank seals water in. When it warps or degrades, water leaks into the bowl and the tank keeps refilling. A quick dye test confirms it — color from the tank showing up in the bowl means the flapper's leaking.
2. A bad fill valve
If the fill valve won't shut off, the tank overfills and drains into the overflow tube — that's the constant hiss or trickle.
3. Float set too high
If the float is set too high, water rises above the overflow tube and never stops. Adjusting it is often a 30-second fix.
4. Chain or flapper misaligned
A chain that's too short (or caught) holds the flapper open a crack. Easy to spot, easy to fix.
DIY or call?
A flapper or fill-valve swap is a reasonable DIY if you're handy. But if you've replaced parts and it still runs, the problem may be the valve seat, water pressure, or an older toilet that's just worn out — worth a professional look.
Replaced the flapper and it still runs? give K2 a call — we'll get to the real cause instead of throwing parts at it.