Toilet won't stop running: causes and fix in Terrassa
Resumen rápido
If the cistern won't stop filling, it's almost always the flush valve or float. In Terrassa 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 Terrassa
45–110 €
Call-out, diagnosis and replacement part.
Contexto local · Terrassa
In Terrassa older buildings have exposed cisterns.
Terrassa has a strong industrial identity: 19th-century textile factories have been converted into lofts and offices in Can Boada and l'Antic Poble de Sant Pere. There we work with 5 m ceilings, wrought-iron beams and original slabs that can't take big point loads — any mezzanine hangs off new steelwork. The rest of the city is 1970s–80s mid-rise with the usual insulation issues. At ~280 m altitude winters are cold and heating demand — heat pumps, biomass, boilers — is high. C-58 access dictates booking order: first slots local, second slots Barcelona.
- Comarca: Vallès Occidental
- Población: 223.627 hab.
- Parque de vivienda predominante: piso-moderno
- Año medio de construcción: 1972
- Códigos postales: 08221, 08222, 08223, 08224, 08225, 08226, 08227, 08228
Antigua capital textil con barrios densos (Ca n’Anglada, Sant Pere Nord) y zonas residenciales en Can Boada y Les Fonts.
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 Terrassa normalmente el mismo día.
Pedir presupuesto gratisProblemas relacionados en Terrassa
Más sobre Plumbing: leaks, blockages and water
Sources and regulation
- CTE DB-HS 4 — Suministro de agua — Código Técnico de la Edificación