Thru Hull is weeping haulout 60 days away.

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Gary_H

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Nov 5, 2007
469
Cal 2-25 Carolina Beach NC
Believe me

If I ever get this thing up on the hill, I will have the proper thruhulls installed. I got a guy that will go with me on the boat. I'll try to find someone who can follow allong in a power boat if possible. There is a thruhull for the sink drain about three feet away. I might be able to rig myy water intake hose to it but there won't be a strainer on it. The starainer is attached directly to the top of the valve so I can't get it off with out putting pressure on the thruhull as well. I'm trying to find a yard that is closer too but they are hard to find nowadays that want to pull a sailboat.
 
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Gary_H

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Nov 5, 2007
469
Cal 2-25 Carolina Beach NC
Believe me

If I ever get this thing up on the hill, I will have the proper thruhulls installed. I got a guy that will go with me on the boat. I'll try to find someone who can follow allong in a power boat if possible. There is a thruhull for the sink drain about three feet away. I might be able to rig myy water intake hose to it but there won't be a strainer on it. The starainer is attached directly to the top of the valve so I can't get it off with out putting pressure on the thruhull as well. I'm trying to find a yard that is closer too but they are hard to find nowadays that want to pull a sailboat.
 
Ross

Ross

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Jun 15, 2004
14,693
Islander/Wayfairer 30 sail number 25 Perryville,Md.
Gary you will need a new strainer anyway

so buy one, jury rig to your sink drain. Protect the suspect through hull from harm and do your trip with a quiet heart.
 
Ross

Ross

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Jun 15, 2004
14,693
Islander/Wayfairer 30 sail number 25 Perryville,Md.
Gary you will need a new strainer anyway

so buy one, jury rig to your sink drain. Protect the suspect through hull from harm and do your trip with a quiet heart.
 
G

Gary_H

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Nov 5, 2007
469
Cal 2-25 Carolina Beach NC
OK that's the plan then ...

I'll go round up all the parts and maybe head down there tomorrow to see what I can rig.
 
G

Gary_H

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Nov 5, 2007
469
Cal 2-25 Carolina Beach NC
OK that's the plan then ...

I'll go round up all the parts and maybe head down there tomorrow to see what I can rig.
 
Ross

Ross

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Jun 15, 2004
14,693
Islander/Wayfairer 30 sail number 25 Perryville,Md.
Mainesail, Generally I agree with most everything you post

but Groco's statement that an in-line valve can loosen is counter to the industrial installations in thousands of plants. There must be applied torque to loosen a pipe fitting and the fitting must be free to turn. The valve on a through hull fitting is constrained by the attachments on the inboard side. Thousands of in-line valves are in service in homes and on transportation equipment and in factories all over the world. They don't come loose because of vibration. The rest of what Groco had to say was perfectly good writing. This is not to diminish the importance of a proper installation and through out industry, tank penetrations are always supported by a secondary means.
 
Ross

Ross

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Jun 15, 2004
14,693
Islander/Wayfairer 30 sail number 25 Perryville,Md.
Mainesail, Generally I agree with most everything you post

but Groco's statement that an in-line valve can loosen is counter to the industrial installations in thousands of plants. There must be applied torque to loosen a pipe fitting and the fitting must be free to turn. The valve on a through hull fitting is constrained by the attachments on the inboard side. Thousands of in-line valves are in service in homes and on transportation equipment and in factories all over the world. They don't come loose because of vibration. The rest of what Groco had to say was perfectly good writing. This is not to diminish the importance of a proper installation and through out industry, tank penetrations are always supported by a secondary means.
 
Tom S

Tom S

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Feb 4, 2004
172
Catalina 36mkII Stamford, CT
I tend to agree with Don

While this is not an installation that I would want to keep on the boat, I think you might be able to take it easy and get your boat to the haul out location. Like Don said its apparent that its been this way for a while. I would pick a nice day & baby it over to the haul out . Looking at the installation it appears it had a few things going against it. 1) No backing plate 2) No "Flanged" Seacock 3)Extra weight and torque of a directly attached strainer. MaineSail is correct, the best way is doing it right with a backing plate & "Flanged" Seacock . Though I have seen smaller boats that didn't have a proper "Flanged" Seacock and just a ball valve that seemed to be adequate, but they had backing plates & it did not have all that extra weight and torque of the strainer. In your installtion a backing plate might have helped a little but what I think probably exacerbated things is the extra weight and torque of a directly attached strainer Here is another bit of info I found on Thru-Hull to Seacock (Seavalve) installtions (I am assuming they are saying these are all NPS (Straight threads) THRU-HULL FITTING LENGTH The thru-hull fitting, when fully installed, should project beyond the internal hull/backing block surface no less than ½" and no more than 1-1/4".Engagement of five (5) full threads will generate the full loading strength of the thru-hull/seavalve assembly, which is well in excess of the 500 pounds, required by the U.L. and A.B.Y.C. standards. http://www.forespar.com/resources2/techTips/MarelonThruHullSeavalveInstallation.shtml Also here is more of the same in regards to what MaineSail was referring to with Threads http://www.forespar.com/resources2/techTips/images/2007_Threadforms_Tech-Tip_8-9-07.pdf
 
Tom S

Tom S

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Feb 4, 2004
172
Catalina 36mkII Stamford, CT
I tend to agree with Don

While this is not an installation that I would want to keep on the boat, I think you might be able to take it easy and get your boat to the haul out location. Like Don said its apparent that its been this way for a while. I would pick a nice day & baby it over to the haul out . Looking at the installation it appears it had a few things going against it. 1) No backing plate 2) No "Flanged" Seacock 3)Extra weight and torque of a directly attached strainer. MaineSail is correct, the best way is doing it right with a backing plate & "Flanged" Seacock . Though I have seen smaller boats that didn't have a proper "Flanged" Seacock and just a ball valve that seemed to be adequate, but they had backing plates & it did not have all that extra weight and torque of the strainer. In your installtion a backing plate might have helped a little but what I think probably exacerbated things is the extra weight and torque of a directly attached strainer Here is another bit of info I found on Thru-Hull to Seacock (Seavalve) installtions (I am assuming they are saying these are all NPS (Straight threads) THRU-HULL FITTING LENGTH The thru-hull fitting, when fully installed, should project beyond the internal hull/backing block surface no less than ½" and no more than 1-1/4".Engagement of five (5) full threads will generate the full loading strength of the thru-hull/seavalve assembly, which is well in excess of the 500 pounds, required by the U.L. and A.B.Y.C. standards. http://www.forespar.com/resources2/techTips/MarelonThruHullSeavalveInstallation.shtml Also here is more of the same in regards to what MaineSail was referring to with Threads http://www.forespar.com/resources2/techTips/images/2007_Threadforms_Tech-Tip_8-9-07.pdf
 
Ross

Ross

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Jun 15, 2004
14,693
Islander/Wayfairer 30 sail number 25 Perryville,Md.
Mainesail, Of course I am not advacating such a mismatch

and never would. Some time I must thread an NPS fitting into an NPT fitting and then saw out a cross section and see what we get. It is easy enough for me to try because the connections on sink faucets are nps and the hook up to those is with a nut and gasket. I shall try it tonight and post my observations. I am always an advocate of doing thing by well proven methods.
 
Ross

Ross

.
Jun 15, 2004
14,693
Islander/Wayfairer 30 sail number 25 Perryville,Md.
Mainesail, Of course I am not advacating such a mismatch

and never would. Some time I must thread an NPS fitting into an NPT fitting and then saw out a cross section and see what we get. It is easy enough for me to try because the connections on sink faucets are nps and the hook up to those is with a nut and gasket. I shall try it tonight and post my observations. I am always an advocate of doing thing by well proven methods.
 
G

Gary_H

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Nov 5, 2007
469
Cal 2-25 Carolina Beach NC
Update!

This past Monday I made the voyage to the boatyard. The trip occurred without incident. I had the boat hauled out and replaced the thru hull with a brand new thru hull and "for real" Groco full flanged seacock and a heavy backing plate. The leak apparently was caused by the breakdown of the original bedding compound. The original thru hull and ball valve were in surprisingly good shape but I replaced them anyway. I also went ahead and repacked the stuffing box while I was at it. Now the CANIC is happy and dry. The trip back on Tuesday was a lot more enjoyable. Thanks all for the advice and very useful information.
 
G

Gary_H

.
Nov 5, 2007
469
Cal 2-25 Carolina Beach NC
Update!

This past Monday I made the voyage to the boatyard. The trip occurred without incident. I had the boat hauled out and replaced the thru hull with a brand new thru hull and "for real" Groco full flanged seacock and a heavy backing plate. The leak apparently was caused by the breakdown of the original bedding compound. The original thru hull and ball valve were in surprisingly good shape but I replaced them anyway. I also went ahead and repacked the stuffing box while I was at it. Now the CANIC is happy and dry. The trip back on Tuesday was a lot more enjoyable. Thanks all for the advice and very useful information.
 
Stillraining

Stillraining

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Dec 8, 2007
478
Irwin 41 CC Ketch LaConner WA
Glad to hear it

Gary. Their is little better then peace of mind. Thanks for the up date.
 
Stillraining

Stillraining

.
Dec 8, 2007
478
Irwin 41 CC Ketch LaConner WA
Glad to hear it

Gary. Their is little better then peace of mind. Thanks for the up date.
 
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