Shakewell Seacocks made by Martwell:
The Shakewell seacock, is a plastic thru-hull valve. Seacocks are the most critical component in a boat; their reliability can mean the difference between life and death. The importance of seacocks is not diminished by less dramatic circumstances: engines, toilets and cockpit drains can all be rendered useless by malfunctioning valves. The weekend sailor is as dependant upon them as the round-the-world racing skipper.
SHAKEWELL SEACOCKS ADVANTAGES:
To be easily, rapidly and safely cleared afloat, if blocked or jammed.
To be capable of being serviced afloat, by taking all the moving parts into the boat, without tools, whilst still retaining useable water flow through the valve.
To tolerate marine growth, shellfish and sand, but remain airtight even if the mechanism and valve canal become scratched by such particles.
To shut flush with the hull to minimise turbulence and to hinder marine growth and mud entering and accumulating in the valve canal.
To be non-metallic in order to eliminate all problems associated with corrosion, and to allow fitting to steel and aluminium, without risk of galvanic degradation.
MADE UNDER ISO-Standard 9093-2