raw water anti siphon/vented loop? - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 05-19-2008
deniseO30's Avatar
Move over Joan Rivers!
 
Join Date: Nov 2006
Location: Bristol pa
Posts: 6,196
Thanks: 52
Thanked 93 Times in 83 Posts
Rep Power: 9
deniseO30 will become famous soon enough deniseO30 will become famous soon enough
raw water anti siphon/vented loop?

Not even sure what it's called. it hangs under my cockpit and drips water on my new PSS seal! not that that's a bad thing... It's gray and made by Vetus. the raw water lines are 5/8 ID and the top of the thingy has a small tube going off into the high point of the exhaust hose.
Question is.. do i need to replace it with the same one? or use a "marelon" vented loop? thanks !
__________________
Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club. New Website!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

My boat is for sale.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #2  
Old 05-19-2008
deniseO30's Avatar
Move over Joan Rivers!
 
Join Date: Nov 2006
Location: Bristol pa
Posts: 6,196
Thanks: 52
Thanked 93 Times in 83 Posts
Rep Power: 9
deniseO30 will become famous soon enough deniseO30 will become famous soon enough
bump it up
__________________
Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club. New Website!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

My boat is for sale.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #3  
Old 05-19-2008
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
Can you post a photo of it?
__________________
Sailingdog

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

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
  #4  
Old 05-19-2008
Senior Member
 
Join Date: Apr 2008
Posts: 476
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
negrini is on a distinguished road
Send a message via AIM to negrini Send a message via Yahoo to negrini Send a message via Skype™ to negrini
Denise, that might be your Vetus siphon breaker .....

installed behind your engine. Salt deposits overtime, will make it useless, and
drip can turn into a real saltwater fall, and ruin your engine. I remember once I opened my engine after months withou inspection, it looked like snowed over it, as water evaporated and a samll layer of salt covered overall the engine after a long time.
Your model should be inspected (by removing its top) and cleaned periodically, and a hose attached to its top tube, should route drips to the bildge, rather over your engine.
The marelon models (i.e. Jabsco and eve Vetus ones) are mostly intended to toalet siphon breakers. Their rubber blade are not so strong to sustain the positive pressure your exaust pose to the system (or negative, depending where you air-broke).
If replacement is what you want, go for the VOLVO model, made out of bronze and more reliable, but will gonna loose the multiple hose diameters feature.
Attached Thumbnails
raw water anti siphon/vented loop?-1211236063.jpg  
Reply With Quote Share with Facebook
  #5  
Old 05-19-2008
JohnRPollard's Avatar
Moderator
 
Join Date: Mar 2007
Location: Chesapeake
Posts: 5,680
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 10
JohnRPollard is a jewel in the rough JohnRPollard is a jewel in the rough JohnRPollard is a jewel in the rough
Denise,

Based on your limited description, it DOES sound like you're describing the anti-siphon vented loop in the raw water cooling system.

The purpose is to prevent raw water -- after shut down -- from continuing to siphon from your intake seacock, through the engine heat exchanger, and ultimately into the water lift muffler. Normally this raw water would be ejected out the tailpipe by exhaust pressure during operation, but absent the exhaust pressure after shut down,the siphoning could fill the waterlift muffler and backflow through the engine exhaust system and into the engine. Hence the siphon break.

If the siphon break is not working, until you get it repaired, you should quickly close the sea-**** immediately after shutting down the engine. (In reality, the vanes of the raw water impeller will often check the flow of the raw water, but it's conceivable they might not so best to be cautious.) Also, I don't see any reason why you couldn't replace the anti-siphon valve with a similar valve from another vendor -- i.e. it doesn't have to be Vetus.
__________________

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

Pacific Seacraft Crealock 31 #62

NEVER CALLS CRUISINGDAD BACK....CAN"T TAKE THE ACCENT
Reply With Quote Share with Facebook
  #6  
Old 05-19-2008
deniseO30's Avatar
Move over Joan Rivers!
 
Join Date: Nov 2006
Location: Bristol pa
Posts: 6,196
Thanks: 52
Thanked 93 Times in 83 Posts
Rep Power: 9
deniseO30 will become famous soon enough deniseO30 will become famous soon enough
Oh My, thanks Negrini! that's it! Now.how do I find the one Volvo makes (been looking) John Ok 'm looking for them now. marelon is the most common.
ps.. I'm assuming I can take it out for now, splice the hoses and do as John suggests.. close the sea valve when not running?

thanks allot everyone!
__________________
Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club. New Website!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

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

Last edited by deniseO30; 05-19-2008 at 07:23 PM.
Reply With Quote Share with Facebook
  #7  
Old 05-19-2008
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
For what size hose: Look HERE about eight items down for the bronze ones.
__________________
Sailingdog

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

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
  #8  
Old 05-19-2008
chucklesR's Avatar
Senior Member
 
Join Date: Sep 2007
Location: Pasadena Md - Magothy side
Posts: 5,978
Thanks: 10
Thanked 30 Times in 30 Posts
Rep Power: 10
chucklesR is a jewel in the rough chucklesR is a jewel in the rough chucklesR is a jewel in the rough
Most common problem is salted and silted up. Peter Compton's 'Troubleshooting Marine Engines' says to just boil 'em, blow 'em clean and put them back. There are no moving parts.
Reply With Quote Share with Facebook
  #9  
Old 05-19-2008
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
BTW, you could probably buy the Volvo version, but it would probably be three-to-four times the price of the ones I linked to above.
__________________
Sailingdog

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

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
  #10  
Old 05-19-2008
deniseO30's Avatar
Move over Joan Rivers!
 
Join Date: Nov 2006
Location: Bristol pa
Posts: 6,196
Thanks: 52
Thanked 93 Times in 83 Posts
Rep Power: 9
deniseO30 will become famous soon enough deniseO30 will become famous soon enough
gotta love you guys! thanks! I found the original but i'm going for the bronze from defender!
fair winds!
Denise
__________________
Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club. New Website!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

My boat is for sale.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
MacGregor 26 vs. ? jiml2p Boat Review and Purchase Forum 199 10-01-2012 02:34 PM
Raw water cooling - removing scale Tomaz Gear & Maintenance 6 09-02-2007 01:16 PM
Oday 30 Raw water flow and folding props deniseO30 O'Day 2 08-13-2007 08:25 AM
Potable Water tdw Provisioning 31 08-11-2007 07:30 AM
Raw Water in Engine wmwtlw Gear & Maintenance 3 02-25-2001 11:31 AM


All times are GMT -4. The time now is 05:30 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.