Reply
 
Thread Tools Display Modes
 
Old 11-15-2015, 10:00 PM   #61
Guru
 
HopCar's Avatar


 
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 3,489
FF I stand by my statement. It is pretty rare for thru-hull fittings to break. If it was a common problem the ABYC wouldn't approve the type of installation we're discussing.
Note that I said rare, not never.

I feel that a flanged seacock bolted to a backing block that is bonded with epoxy to the hull is an excellent installation. Through bolting adds a little strength and puts three more holes in the hull. Don't forget that the bronze thru-hull itself acts as a big bolt to secure the seacock to the hull.
__________________
Advertisement

__________________
Parks Masterson
www.hopkins-carter.com
HopCar is offline   Reply With Quote
Old 11-17-2015, 06:17 AM   #62
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 16,512
Look at post 54 , this extension of brass items gives leverage to whatever force is applied to the fitting.
__________________

FF is offline   Reply With Quote
Old 11-17-2015, 06:37 AM   #63
Guru
 
angus99's Avatar
 
City: Signal Mtn., TN
Country: US
Vessel Name: Stella Maris
Vessel Model: Defever 44
Join Date: Feb 2012
Posts: 1,379
Quote:
Originally Posted by FF View Post
Look at post 54 , this extension of brass items gives leverage to whatever force is applied to the fitting.
Good eye. I'm considering wooden blocks under some of the longer units as belt and suspenders protection -- although I doubt they'll ever be needed. I torqued the bejeezus out of them with pipe wrenches and all 210 of my pounds and they are rock solid. I worry more about my sea strainers.
angus99 is offline   Reply With Quote
Old 11-17-2015, 07:05 AM   #64
Guru
 
menzies's Avatar
 
City: Jacksonville
Country: USA
Vessel Name: SONAS
Vessel Model: Grand Alaskan 53
Join Date: May 2014
Posts: 2,195
God bless you, and good luck.

Personally I would never attempt this.
menzies is offline   Reply With Quote
Old 11-17-2015, 07:18 AM   #65
Guru
 
angus99's Avatar
 
City: Signal Mtn., TN
Country: US
Vessel Name: Stella Maris
Vessel Model: Defever 44
Join Date: Feb 2012
Posts: 1,379
Not clear on who you're sending your blessings and good wishes to . . . but if for me, thank you. I found that researching, preparing and stressing about the job was much simpler than just doing it and would not hesitate to do it again.
angus99 is offline   Reply With Quote
Old 11-17-2015, 09:45 AM   #66
Guru
 
boatpoker's Avatar
 
City: Port Credit
Country: Ontario
Vessel Name: DIRT FREE
Vessel Model: Benford Fantail 38
Join Date: Sep 2012
Posts: 2,011
Quote:
Originally Posted by HopCar View Post
FF I stand by my statement. It is pretty rare for thru-hull fittings to break. If it was a common problem the ABYC wouldn't approve the type of installation we're discussing.
ABYC does not approve that type of installation or any other. they simply state what it must accomplish/withstand.
__________________
If you can live with the consequences, go for it - wg
Y'am what I y'am an' thats' all that y'am - Popeye
As God is my witness, I thought turkey's could fly. Mr.C
boatpoker is offline   Reply With Quote
Old 11-20-2015, 05:14 PM   #67
Guru
 
cardude01's Avatar
 
City: Victoria TX
Country: USA
Vessel Name: Bijou
Vessel Model: 2008 Island Packet steadysailer
Join Date: Nov 2012
Posts: 3,164
Click image for larger version

Name:	ImageUploadedByTrawler Forum1448057586.621441.jpg
Views:	46
Size:	45.6 KB
ID:	46713
Click image for larger version

Name:	ImageUploadedByTrawler Forum1448057601.106781.jpg
Views:	40
Size:	40.4 KB
ID:	46714

Pretty slick IMO. Ball valve screws on top.
cardude01 is offline   Reply With Quote
Old 11-25-2015, 10:48 AM   #68
Veteran Member
 
dbltime's Avatar
 
City: Annapolis
Country: United States
Vessel Name: Riverdance, Hornet, Janet-R
Vessel Model: 45' Princess F/B, J88, Jarvis N 32
Join Date: Aug 2015
Posts: 43
Last week I decided it was time to clean my strainers. After cleaning the generator intake strainer basket I reached down to pull up (open) the ball valve and it snapped off at the thru hull. Having my face 2 feet from the thru hull I can confirm the salinity of Lake Worth as many parts per million. This was of course Saturday afternoon so no haul outs available. I stuffed a rag in the hole and drove it tight with a screw driver and hammer. I have been carrying the wood plug bag on 6 boats but not this one. Trip to the store for wood plugs. Monday we hauled. Electrolysis destroyed the thru hull. For some reason not connected to the bonding system. New thru hull, sea cock and bonding wire installed. All is good. Glad that unit did not let go while I was offshore heading south this year. I also realized my high water alarm is hooked up to the engine room and bow bilge pumps but not the stern where the gen set and intake are located. Yikes.
dbltime is offline   Reply With Quote
Old 11-25-2015, 11:11 AM   #69
Guru
 
boatpoker's Avatar
 
City: Port Credit
Country: Ontario
Vessel Name: DIRT FREE
Vessel Model: Benford Fantail 38
Join Date: Sep 2012
Posts: 2,011
Quote:
Originally Posted by dbltime View Post
Last week I decided it was time to clean my strainers. After cleaning the generator intake strainer basket I reached down to pull up (open) the ball valve and it snapped off at the thru hull. Having my face 2 feet from the thru hull I can confirm the salinity of Lake Worth as many parts per million. This was of course Saturday afternoon so no haul outs available. I stuffed a rag in the hole and drove it tight with a screw driver and hammer. I have been carrying the wood plug bag on 6 boats but not this one. Trip to the store for wood plugs. Monday we hauled. Electrolysis destroyed the thru hull. For some reason not connected to the bonding system. New thru hull, sea cock and bonding wire installed. All is good. Glad that unit did not let go while I was offshore heading south this year. I also realized my high water alarm is hooked up to the engine room and bow bilge pumps but not the stern where the gen set and intake are located. Yikes.
Scary stuff indeed. Although I would not say it never happens I have never seen a true bronze throughull or seacock suffer from electrolytic corrosion.
Do you know what make it was ?
__________________
If you can live with the consequences, go for it - wg
Y'am what I y'am an' thats' all that y'am - Popeye
As God is my witness, I thought turkey's could fly. Mr.C
boatpoker is offline   Reply With Quote
Old 11-25-2015, 11:23 AM   #70
Veteran Member
 
dbltime's Avatar
 
City: Annapolis
Country: United States
Vessel Name: Riverdance, Hornet, Janet-R
Vessel Model: 45' Princess F/B, J88, Jarvis N 32
Join Date: Aug 2015
Posts: 43
You can see the red at the break
dbltime is offline   Reply With Quote
Old 11-25-2015, 11:24 AM   #71
Veteran Member
 
dbltime's Avatar
 
City: Annapolis
Country: United States
Vessel Name: Riverdance, Hornet, Janet-R
Vessel Model: 45' Princess F/B, J88, Jarvis N 32
Join Date: Aug 2015
Posts: 43
lost the pic
Attached Thumbnails
Click image for larger version

Name:	IMG_1914 (1).JPG
Views:	37
Size:	127.5 KB
ID:	46823  
dbltime is offline   Reply With Quote
Old 11-25-2015, 11:42 AM   #72
Guru
 
boatpoker's Avatar
 
City: Port Credit
Country: Ontario
Vessel Name: DIRT FREE
Vessel Model: Benford Fantail 38
Join Date: Sep 2012
Posts: 2,011
Quote:
Originally Posted by dbltime View Post
lost the pic
If you can see red or deep pink you are most likely looking at brass.
Cheap junk that should never be put in a boat.
__________________
If you can live with the consequences, go for it - wg
Y'am what I y'am an' thats' all that y'am - Popeye
As God is my witness, I thought turkey's could fly. Mr.C
boatpoker is offline   Reply With Quote
Old 11-25-2015, 11:49 AM   #73
Guru
 
psneeld's Avatar
 
City: Avalon, NJ
Country: USA
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 15,853
Are you replacing a thru hull and ball valve with the same as opposed to a true seacock? Or is the pic just to show what was there?

I have had fittings on air conditioning circuits break easily and upon inspection they were very thing...I am guessing erosion as opposed to corrosion. Did the genset have a lot of hours on that thru hull?
psneeld is offline   Reply With Quote
Old 11-25-2015, 12:18 PM   #74
Guru
 
HopCar's Avatar


 
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 3,489
Electrolysis can certainly destroy bronze. That's why we put zinc or aluminum anodes on our boats.


Brass is subject to electrolysis and another type of corrosion called de-zincification.


I urge you to install a real flanged seacock or a Groco Flanged adapter and connect it to your bonding system.


Look at the pictures in post 39. Angus did a very nice job of installing Groco flanged adapters. He later installed good marine quality ball valves on the Flanged Adapters.
__________________
Parks Masterson
www.hopkins-carter.com
HopCar is offline   Reply With Quote
Old 11-25-2015, 12:26 PM   #75
Guru
 
City: Fort Myers
Country: USA
Join Date: Jul 2013
Posts: 953
Maybe a standard hardware store pipe nipple, looks rusted to me..?
Quote:
Originally Posted by dbltime View Post
lost the pic
Marlinmike is offline   Reply With Quote
Old 11-25-2015, 12:44 PM   #76
Guru
 
HopCar's Avatar


 
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 3,489
Your new stuff looks like Groco which is 85-5-5-5 Bronze, excellent.
Now add a Flanged Adapter and a backing pad and you have a first class installation.

If you decide not to use the flanged adapter, at least cut the thru-hull fitting so that there is only about a half inch of thread exposed between the top of the thru-hull nut and the bottom of the ball valve.
__________________
Parks Masterson
www.hopkins-carter.com
HopCar is offline   Reply With Quote
Old 11-25-2015, 01:25 PM   #77
Enigma
 
RT Firefly's Avatar
 
City: Slicker?
Country: Bumpkin?
Join Date: Oct 2007
Posts: 9,994
Greetings,
"Brass is subject to electrolysis and another type of corrosion called de-zincification." Bronze is subject to de-stanification.
__________________
RTF
RT Firefly is offline   Reply With Quote
Old 11-25-2015, 03:51 PM   #78
Guru
 
Capt.Bill11's Avatar
 
City: Sarasota/Ft. Lauderdale
Country: USA
Join Date: Apr 2014
Posts: 5,422
Quote:
Originally Posted by Marlinmike View Post
Maybe a standard hardware store pipe nipple, looks rusted to me..?
That's not rust, it's copper.
__________________

Capt.Bill11 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 01:03 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012