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06-20-2017, 04:44 PM
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#1
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Senior Member
City: Houston, TX
Vessel Name: Good Vibrations
Vessel Model: Grand Banks Classic 42
Join Date: May 2013
Posts: 187
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Installing New Holding Tank in GB 42
I have a leaking holding tank in my 30 yr old GB 42 and got great guidance from this forum on a replacement tank from Ronco plastics. For anyone who has done this project before, one question: the old steel tank is tightly fit in an opening between the engines that's just under 16" wide. the new plastic tank is only 13" wide so I'll need to use a material to support the tank's sides and fill the gap, approx 1 1/2" on ea side. First thought was using wood. Also thought of a foam fill. For anyone who has done this before, please advise.
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06-20-2017, 05:27 PM
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#2
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Guru
City: Sarasota/Ft. Lauderdale
Join Date: Apr 2014
Posts: 5,438
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I would use Starboard or PVC board.
No painting, no rotting.
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06-20-2017, 05:29 PM
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#3
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Moderator Emeritus
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 21,189
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Second on Starboard. Foam might crush the tank when expanding if there is no way for the excess to get out. If you do foam, go a little at a time.
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06-20-2017, 07:16 PM
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#4
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Senior Member
City: Houston, TX
Vessel Name: Good Vibrations
Vessel Model: Grand Banks Classic 42
Join Date: May 2013
Posts: 187
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Holding tank install question
thanks for material suggestions!
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06-20-2017, 07:56 PM
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#5
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Senior Member
City: Poulsbo, WA
Vessel Name: M/V Knot Knormal
Vessel Model: President 41
Join Date: May 2011
Posts: 282
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I used the Man-Made decking from Lowes. They have it in 2x4, for hand rails, and I just ripped it to the appropriate thickness and taper and use it in strips to both support the tank and lock it in place.
Marty....................
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06-20-2017, 08:34 PM
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#6
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Guru
City: Sarasota/Ft. Lauderdale
Join Date: Apr 2014
Posts: 5,438
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Quote:
Originally Posted by MartySchwartz
I used the Man-Made decking from Lowes. They have it in 2x4, for hand rails, and I just ripped it to the appropriate thickness and taper and use it in strips to both support the tank and lock it in place.
Marty....................
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That's another good idea.
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06-20-2017, 09:29 PM
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#7
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Senior Member
City: Houston, TX
Vessel Name: Good Vibrations
Vessel Model: Grand Banks Classic 42
Join Date: May 2013
Posts: 187
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Holding Tank Install
thanks for the man made decking suggestion. considering the thicknesses I need, makes more sense.
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06-22-2017, 05:37 AM
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#8
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Guru
Join Date: Oct 2007
Posts: 22,553
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Spray in Foam, , If ever needed it can be removed by hand .
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