Toilet won't stop running: causes and fix in Rubí
Resumen rápido
If the cistern won't stop filling, it's almost always the flush valve or float. In Rubí 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 Rubí
45–110 €
Call-out, diagnosis and replacement part.
Contexto local · Rubí
In Rubí older buildings have exposed cisterns.
Rubí grew in two clear waves: the old town and 1960s–70s residential estates, then a second new-build wave between 2000 and 2010 toward Sant Muç and Can Mir. The old town still has pre-2002 electrical installations we upgrade before any other work. The new expansion concentrates semi-detached homes with heat pumps that need yearly servicing. The historic Rubí stream floods mean we always check drainage and non-return pumps in ground-floor flats before closing up a bathroom. Wide streets, easy van access.
- Comarca: Vallès Occidental
- Población: 79.317 hab.
- Parque de vivienda predominante: piso-moderno
- Año medio de construcción: 1978
- Códigos postales: 08191
Crecimiento marcado por torres de los 70 en Les Torres y casas en Can Mir.
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 Rubí normalmente el mismo día.
Pedir presupuesto gratisProblemas relacionados en Rubí
Más sobre Plumbing: leaks, blockages and water
Sources and regulation
- CTE DB-HS 4 — Suministro de agua — Código Técnico de la Edificación