Geyser Water Smells Bad — Causes & Fix
An unusual smell from hot water — musty, metallic, or specifically like rotten eggs — each points to a different cause, and recognising which one helps get the right fix on the first visit.
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Rotten Egg / Sulphur Smell
A specific chemical reaction between certain anode rod materials and some water supplies produces this distinct smell — see our anode rod guide for the fix.
Signs: Smell specifically resembles sulphur/rotten eggs.
Rs 400 - 800 (anode swap)Musty or Stale Smell
Standing water in a tank that's gone unused for a while (vacation, seasonal disuse) can develop a stale smell, usually resolved by flushing.
Signs: Smell noticed after a period of non-use.
Free — flush tank firstCan try yourselfMetallic Smell
Often linked to early tank corrosion, similar to the cause behind discolored water — worth checking alongside that symptom.
Signs: See our discolored water guide if this is also present.
Diagnosis neededBurning or Electrical Smell
This is different from a water odor — a burning smell near the geyser itself suggests an electrical fault, not a water quality issue.
Signs: Smell noticeable near the unit, not in the water itself.
Stop use — inspect promptlyFrequently Asked Questions
Is rotten egg smell water safe to use?
It's generally not a health hazard for bathing, but it's unpleasant and usually resolved by replacing the anode rod with a different material suited to your water supply.
How do I fix a musty smell after not using the geyser for a while?
Run the hot tap for several minutes to flush out standing water before regular use resumes — this often resolves it without needing a repair.
Is a burning smell the same as a water odor issue?
No, that's a distinct and more urgent electrical concern — stop use and get it inspected rather than treating it as a water quality issue.
Will this recur after fixing it once?
Depends on the cause — anode-related smells are usually a one-time fix with the right replacement part, while stale smells from disuse can recur if the geyser sits unused again.
Unusual Smell From Hot Water? Let's Identify the Exact Cause.
Same day repair · Inspection Rs 99 · No fix no charge · All brands