SailNet Community - View Single Post - Vented Loop Design?
View Single Post
  #6  
Old 08-30-2012
Maine Sail's Avatar
Maine Sail Maine Sail is offline
Senior Member
 
Join Date: Jan 2003
Location: Maine Coast
Posts: 5,273
Thanks: 9
Thanked 113 Times in 83 Posts
Rep Power: 15
Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice Maine Sail is just really nice
Re: Vented Loop Design?

Quote:
Originally Posted by eherlihy View Post
...and that's why I removed the duckbill and modified it to match the original design. I can see where the vent tube eventually goes vertical, and it has worked this way since 1987. There is no way that the duckbill could be mounted vertically unless I change a bunch of 3/4" exhaust hose.

I guess that I made the right decision.
Just be sure your "exit" hose does not have any dips in it that can collect and hold water. With a bad impeller even a small "trap" can cause a siphon.

For engine vacuum breakers I prefer the ones made by the Scot Pump Co. as I find they are far more trouble free than a duck bill....

You can buy just the vacuum breaker:

Or the whole thing:

I tend to just make custom ones:



This was Ericson's idea for a siphon break and it sprayed salt water all over the engine when the brazed copper tube failed. It was also mounted under the cockpit:


A few dollars and 30 minutes later a new one that is significantly more robust replaced it.
__________________
______
-Maine Sail / CS-36T


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.




© Images In Posts Property of Compass Marine Inc.


Reply With Quote Share with Facebook