Re: Sea Chest


Sv Garulfo
 

Hi Mark,

Thanks for the clarification. I can see how it would help keeping units downstream of the manifold primed. A54 (at least ours, but I believe all) have a check valve in front of the anchor wash pump, although it’s prone to clogging open and fail, like I described in post
Incidentally, it has failed again a few months after I had cleaned it, so I probably need to change it. The symptoms (squirting in the cockpit drain) reappeared and I resorted to grey tape the anchor wash outlet as a temporary measure, which stopped the squirting immediately. 

Having said that, your device doesn’t help purging out  air accumulated in the seachest through the thruhull, because of air bubbles or a deep roll while sailing. That accumulated air still needs to be evacuated through the raw water consumers. On the A54 the fridge circulation pump usually does that job. 


Best,
Thomas
GARULFO 
A54-122
Huahine, French Polynesia 


On 10 Apr 2021, at 01:53, CW Bill Rouse <brouse@...> wrote:

Mark,

That brass one-valve was not original. 

Best,

CW Bill Rouse 
Amel Owners Yacht School
+1 832-380-4970 | brouse@...
720 Winnie, Galveston Island, Texas 77550 
www.AmelOwnersYachtSchool.com 
Yacht School Calendar: www.preparetocastoff.blogspot.com/p/calendar.html


   

On Fri, Apr 9, 2021, 10:48 PM Mark Erdos <mcerdos@...> wrote:

I have a one-way flap valve between the manifold and the sea-chest/strainer. It is not possible for water to easily flow backward toward the sea-chest even if the engine or genset pulls water faster than the strainer can provide (if dirty). This ensures my pumps for AC, water makers and heads remain primed and I get no air in the sea-chest. The original was brass and I upgraded to stainless when I rebuilt the manifold.

 

Check valves - Check valves manufacturer - SIO

 

 

 

 

With best regards,

 

Mark

 

Skipper

Sailing Vessel - Cream Puff - SM2K - #275

Currently cruising - Tahiti, French Polynesia

www.creampuff.us

 

From: main@AmelYachtOwners.groups.io [mailto:main@AmelYachtOwners.groups.io] On Behalf Of CW Bill Rouse
Sent: Friday, April 9, 2021 2:40 PM
To: main@AmelYachtOwners.groups.io Notification
Subject: Re: [AmelYachtOwners] Sea Chest

 

That would certainly suck air into the strainer because the suction from various pumps would overcome a one-way valve. All of the one-way valves I am familiar with for water do not work well for air.

 

I am not sure what Mark is talking about because the sea chest contains the strainer.

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CW Bill Rouse Amel Owners Yacht School

Address: 720 Winnie, Galveston Island, Texas 77550 

 

View My Training Calendar

 

 

On Fri, Apr 9, 2021 at 6:19 PM Sv Garulfo <svgarulfo@...> wrote:

hi Mark,

 

Can you expand on that idea? I don’t really see where that valve would be?

 

Bill, 

What do you think of a hose out of the Vetus lid, up over the water line and outputting in the cockpit drain (which is very nearby on the A54), with a one way valve to let accumulated air out into the cockpit drain but preventing any suction of air through there? 

Raw water consumers would pump sea water through the chest and strainer and any accumulated air (up to the waterline) would rejoin the atmosphere by simple gravity. 

Arguably, the rolling motion of the boat would continuously fill that one-way hose with sea water until it overflows in the drain. Also, removing the vetus lid for maintenance of he sea chest would be messier, having to deal with the water left in the hose. Maybe a Gardena type adapter to easily remove the hose from the lid even if it’s full. The same fitting could be used to feed the system fresh water for wintering like Arno did.

 

Any views ?

 

Thanks

 

Fair winds

 

Thomas

GARULFO 

A54-122

Huahine, French Polynesia 

 

 

 

On Sun, 29 Nov 2020 at 11:28, Mark Erdos <mcerdos@...> wrote:

The most effective way I have found to prevent air accumulation in the strainer it to install a one-way flow valve between the strainer and the sea-chest.

 

 

With best regards,

 

Mark

 

Skipper

Sailing Vessel - Cream Puff - SM2K - #275

Currently cruising - Tahiti, French Polynesia

www.creampuff.us

 

 

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