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Through hull fittings
Hull penetrations and their associated valves, sealing components, and corrosion protection — covering skin fittings, seacocks, tail pipe adaptors, and bonding systems.
71 data points
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Bonding & corrosion protection
4 data points
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Bonding connection
Electrical bonding wire connecting the seacock body to the vessel's bonding system, equalising potential and reducing galvanic risk.
under construction
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Bonding lug
Terminal on the seacock body accepting the bonding wire.
under construction
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Bonding wire
Tinned copper conductor running to the vessel's common bonding bus.
under construction
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Through hull fitting anode
The sacrificial corrosion anode installed at or around a through-hull fitting to prevent galvanic corrosion of the fitting and adjacent underwater metals.
under construction
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Seacock
Isolation valve assembly mounted inboard of the skin fitting, comprising the seacock body, ball valve, valve seats, lever handle, stem packing, and gland nut — the primary means of shutting off flow through a hull penetration.
under construction
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Ball valve
Ported ball providing full-bore open and fully closed positions with a quarter-turn of the lever.
under construction
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Gland / packing nut
Threaded nut compressing the stem packing to prevent leakage around the valve spindle.
under construction
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Lever handle
Operating lever showing open/closed orientation at a glance; removable on some designs as a security measure.
under construction
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Seacock body
Bronze or Marelon valve body housing the ball mechanism; threaded onto the hull fitting and secured against rotation.
under construction
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Stem packing
PTFE or graphite packing sealing the valve stem where it exits the body.
under construction
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Valve seats
PTFE or elastomer seats providing a watertight seal against the ball in the closed position.
under construction
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Tail pipe / hose adaptor
under construction
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Hose barb or threaded nipple
Mechanical connection retaining the hose or pipe on the seacock outlet.
under construction
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coming soon |
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Hose clip
Stainless double-clipped hose clips securing the hose to the tail pipe; two clips required on all below-waterline connections.
under construction
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Tail pipe / hose adaptor
Outlet connection on the inboard face of the seacock accepting a hose or pipe; barbed, threaded, or flanged depending on application.
under construction
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coming soon |
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Through hull skin fitting
Through hull assembly penetrating the hull below the waterline, comprising a hull fitting threaded into a backing nut and plate with sealant.
67 data points
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Backing nut
Threaded nut tightened against the inner hull face to clamp the hull fitting securely in place, preventing rotation and drawing the flange tight against the outer hull surface.
15 data points
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Backing plate
Internal plate bonded or fastened against the hull to spread the load of the fitting and prevent hull distortion.
13 data points
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Sealant / bedding compound
Polysulphide or equivalent marine sealant bedding the flange to the hull, preventing water ingress around the fitting.
17 data points
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Through hull fitting (skin fitting)
Threaded bronze or composite spigot passing through the hull shell; flanged on the inboard face and sealed against the hull with sealant.
22 data points
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