Toilet won't stop running: causes and fix in Cornellà de Llobregat
Resumen rápido
If the cistern won't stop filling, it's almost always the flush valve or float. In Cornellà de Llobregat limescale speeds up wear.
¿Qué está pasando?
When the cistern keeps running, water comes in faster than the float can shut off, or the flush seal lets water escape.
Causas más probables
Worn flush seal
altaThe rubber bell hardens and leaks.
Misaligned or broken float
mediaIt can stick or be punctured.
Limescale-clogged fill valve
mediaLimescale clogs the inlet filter.
Pasos de diagnóstico
- 1
Close the toilet stop valve
There is a small valve behind or under the toilet.
- 2
Lift the cistern lid and watch
If water rises and spills over the overflow it's the float.
- 3
Identify the model and buy the part
Take a photo of the mechanism.
Cuándo llamar a un profesional
Call a plumber if the cistern is wall-embedded or water leaks from under the toilet.
Coste orientativo en Cornellà de Llobregat
45–110 €
Call-out, diagnosis and replacement part.
Contexto local · Cornellà de Llobregat
In Cornellà de Llobregat older buildings have exposed cisterns.
Cornellà de Llobregat grew fast between 1965 and 1985 and most of its buildings fall in that bracket: 6–10-storey blocks in Centre, Almeda and Sant Ildefons. The big recent change is Next Generation-funded refurbs, mostly heat pumps and external wall insulation; our installers process the grants and sign the energy certificates. We still find old town-gas inlets in kitchens that need auditing before any work. Cornellà has decent loading zones and ample block parking, which keeps long-day jobs cheaper than dense L'Hospitalet or Santa Coloma.
- Comarca: Baix Llobregat
- Población: 88.224 hab.
- Parque de vivienda predominante: piso-moderno
- Año medio de construcción: 1976
- Códigos postales: 08940
Núcleo de Baix Llobregat con bloques densos en Sant Ildefons y crecimiento reciente en el área del Walden.
Preguntas frecuentes
How much water does it waste?
Between 100 and 400 litres a day.
Can I do it myself?
Yes for exposed cisterns.
¿Prefieres que vayamos nosotros?
Diagnóstico y presupuesto en Cornellà de Llobregat normalmente el mismo día.
Pedir presupuesto gratisProblemas relacionados en Cornellà de Llobregat
Más sobre Plumbing: leaks, blockages and water
Sources and regulation
- CTE DB-HS 4 — Suministro de agua — Código Técnico de la Edificación