Originally Posted by HeinSdL
Checking the proper operation of the anti syphon valve yearly is thus to be recommended (extremely simple, it's just a spring loaded device allowing air into the system when the pressure inside drops). The small valve can get stuck in place leading to problems.
I recommend a different type of syphon break, that of a small pipe coming out of a "T" at the top of the loop with a small adjustable petcock on it. This pipe can go into a cockpit
drain or a sink or somewhere. You adjust the petcock until only a small spray or dribble of water
comes out when the engine
is running. That water
runs harmlessly into whatever drain you have. When the engine
stops air goes into the petcock and breaks the syphon.
Wit this system you get used to the sound of the water flowing out of that little pipe and you know no blockage has occurred. If you don't hear the water running you need to clear the line, usually by opening then slightly closing the petcock.
if this is in the cockpit
drain then you might want to close that petcock if sailing in severe storm condition with the engine off so that water does not fill the cockpit and then begin filling your vented loop.
Sailing is a sport, an athletic activity, not a sedentary one.
Fred Roswold-Fred & Judy, SV Wings, Mexico