Patrick, Maine Sail, the guy from marinehowto.com <http://marinehowto.com/>, recommends “ siphon breaks from the Scot Pump Company to be among the most reliable and trouble free of any I have used or worked on.”
The Scott siphon break uses a stainless loop with the Westerbeke anti siphon valve made by MMD Powerline part # MMDW-44438. See: http://www.scotpump.com/#marketmarine <http://www.scotpump.com/#marketmarine> http://www.betamarinenc.com/product/anti-syphon-valve/ <http://www.betamarinenc.com/product/anti-syphon-valve/> On another note, while most wet exhaust vented loops are installed just before the exhaust mixing elbow, I have been told that a vented loop can(and should) be installed after the raw water pump and before the intake to the heat exchanger or engine. This way, the vented loop works with ambient temperature sea water and not engine heated hot sea water. - Paul E. 1981 C&C 38 Landfall S/V Johanna Rose Fort Walton Beach, FL http://svjohannarose.blogspot.com/ > On Jan 29, 2018, at 7:38 PM, cnc-list-requ...@cnc-list.com wrote: > > Date: Mon, 29 Jan 2018 12:50:39 -0800 > From: Patrick Davin <jda...@gmail.com <mailto:jda...@gmail.com>> > To: cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com> > Subject: Re: Stus-List Vented loop for engine above exhaust elbow? > Message-ID: > <cahixy6rfql-arl4u5edbtpmtyn-_0uuoosupf4dlo6tbnz6...@mail.gmail.com > <mailto:cahixy6rfql-arl4u5edbtpmtyn-_0uuoosupf4dlo6tbnz6...@mail.gmail.com>> > Content-Type: text/plain; charset="utf-8" > > For those that have one, do you know what kind you have? Vetus makes a few > - https://www.google.com/search?q=vetus+vented+loop > <https://www.google.com/search?q=vetus+vented+loop> - and there are the > Forespar Marelon ones. I read some of the Vetus ones require running a vent > line overboard or to a cockpit drain, or they leak water into the boat. > > Also where do you have it mounted / how high? My mechanic suggested > mounting it as high as possible, which means running it up into the stbd > lazarette. I'm hesistant about that because our lazarette is jam packed > full while cruising (it's our only large storage space).
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