Our toilet keeps running constantly and the plumber said the internal mechanism is shot. It's an old built-in cistern from the 1960s and I'm worried about the cost. Do they have to replace the whole thing or just the innards? Should I get multiple quotes first?
Replacing just the internal fill valve and flapper (€80–150 + labour) is often possible and cheaper than a full cistern swap. However, if the cistern itself is cracked or corroded, you'll need full replacement (€300–600 parts + €150–250 labour). Labour typically runs €60–90/hour; a job like this usually takes 1–2 hours. Cost drivers: cistern age (parts harder to source), wall access difficulty, and whether you're replacing the whole unit or just internals. This is not a DIY task if it's built into the wall—you need a qualified plumber (NEN 1010 compliant). Post your situation on AstraNL with photos and get 3 verified quotes to compare; most will diagnose for free before quoting.
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