Best Plumbing Supplies — Fernox (2026)
1 plumbing supplies matching brand “Fernox”, hand-picked from UK Amazon listings.
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£13.99
Pros
- Seals small, inaccessible leaks without draining the whole system
- One bottle treats up to 130 litres of system water (around 16 radiators)
- Non-toxic and safe to leave permanently in the heating system
Cons
- Not a fix for larger leaks or damaged pipework