Encyklopedia jachtów
Bronze seacock
Bronze seacocks on yachts: why the alloy matters, seize and dezincification clues, and FairHelm survey checks below the waterline.
Co to jest
A bronze seacock is a marine valve, typically on a thru-hull, cast or machined from copper alloy chosen for seawater service below the waterline.
Anchor
Nordic yards still meet bronze and DZR-style fittings. FairHelm also sees mixed stainless or composite conversions and seized handles after winters ashore.
FairHelm judgment
FairHelm judgment: a seacock that will not close, a cracked flange, or green powdery corrosion is a hard survey item. Pretty bilge photos do not replace a handle test.
Limits
We do not invent alloy life percentages. Water chemistry, bonding, and winterisation change outcomes. Confirm the alloy claim on the part in front of you.
Najczęściej zadawane pytania
Q: Is every yellow metal seacock true bronze?
A: No. Labels vary. Ask for alloy marks and surveyor reading.
Q: Can I leave seacocks open all winter ashore?
A: Follow yard practice. Seized handles after dry storage are common survey finds.
Q: Is stainless always better than bronze below the waterline?
A: Not automatically. Material, design, and installation must match the duty.