Originally Posted by carlager
Our Beneteau Oceanis 36cc was built in France in 2003.
We bought it in 2010. The survey report states that seacocks are made of bronze ("Bon etat des passe-coques en bronze")
An earlier report issued in march 2009 also concluded that the seacocks are made of bronze ("Les passecocques en bronze ne presentment pas de corrosion active"
I assume the seacock valves are made of bronze
Can this be confirmed from the attached photo ?
To be clear the three items in the picture are ball valves, not seacocks. As mentioned earlier seacocks have a flange at the bottom which bolts to or through the hull.
Groco makes an IBVF adapter that can be screwed over an existing installed thruhull to turn a thruhull/ballvalve setup into a seacock.
It is important to know the difference between straight threads and tapered threads. Straight threads should not be used with tapered threads, the reason being that a tapered thread fitting will only catch a straight thread fitting by a few threads before it's tight.
The IBVF adapter provides a flange to attach to the hull, (usually with the addition of a backing plate to add thickness to the hull,) and it provides a straight female thread to attach to the straight male thread of the thruhull, and a tapered male thread to attach to the tapered female thread of the ballvalve.
There is some clear concise info on the Internet
. The clear objective when installing this is to us similar threads. In the US we use NPS and NPT. National Pipe Straight and National Pipe Tapered.