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Old 01-05-2018, 09:36 AM   #1
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DIY tanks?

Can fiberglass(like the kits at West Marine) be used to make black water tanks? Would it contain the smell?

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Old 01-05-2018, 09:43 AM   #2
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I met a gentleman several years ago that built water and waste tanks out of 3/4" plywood and lined them with West epoxy and fiberglass. It seemed to work well for him.
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Old 01-05-2018, 10:06 AM   #3
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Originally Posted by PNW_Steve View Post
I met a gentleman several years ago that built water and waste tanks out of 3/4" plywood and lined them with West epoxy and fiberglass. It seemed to work well for him.
Kinda thinking it might work...idk

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Old 01-05-2018, 10:30 AM   #4
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I've seen that done on some boat building forums for water tanks. Don't see why it wouldn't work for a black water tank. Look around on those kinds of forums for examples. Basically 3/4" marine plywood with a fiberglass liner, pretty much like you've described. I might consider doing the same for my gray water, if I can't find the optimal size tank.
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Old 01-05-2018, 11:09 AM   #5
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Not uncommon at all. Here's a thread on a tank for a boat. No different than my FG motorcycle tank.
Fiberglass Holding Tank ? - Cruisers & Sailing Forums
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Old 03-06-2018, 10:59 PM   #6
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I bent up some aluminum and tig welded them up, no rust, corrosion and can support themselves, a local welding shop should be able to fix you up.
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Old 03-07-2018, 06:14 AM   #7
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I've built aircraft fuel tanks (and whole aircraft) out of fiberglass and am certain that it will work for water - even nasty black water. That said, it is not an easy or inexpensive solution. Unless you need a very unique shaped tank, I would think that an off the shelf plastic tank would be much less expensive.

There are several approaches in addition to the lined box suggestion above. Making a mold out of foam, sealing it, glassing it, and then removing the foam is another. Glassing both sides of 1/4"-ish foam and then using those panels to build a box (and glassing them all together is another approach. I can supply more info/links if you decide to go this route.
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Old 03-07-2018, 06:20 AM   #8
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Quote:
Originally Posted by JDOnTheGo View Post
I've built aircraft fuel tanks (and whole aircraft) out of fiberglass and am certain that it will work for water - even nasty black water. That said, it is not an easy or inexpensive solution. Unless you need a very unique shaped tank, I would think that an off the shelf plastic tank would be much less expensive.

There are several approaches in addition to the lined box suggestion above. Making a mold out of foam, sealing it, glassing it, and then removing the foam is another. Glassing both sides of 1/4"-ish foam and then using those panels to build a box (and glassing them all together is another approach. I can supply more info/links if you decide to go this route.
Thx

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Old 03-12-2018, 09:04 PM   #9
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I built my black and grey tanks with epoxy/fiberglass on foam on plywood. It holds water, but I haven't really put-it-to-test with long term use yet.

Things would probably have worked out better if I knew what I was doing, but my bus project has been from day one a learn by doing kind of thing. Would of used a gallon less epoxy too!

Here's a link to that misguided project:!\ http://www.skoolie.net/forums/f10/ho...anks-6972.html
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