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Old 10-29-2008, 08:22 PM   #1
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custom or ABS tanks

I'm in research mode for tank options and am a little confused. Some of the stock sized aftermarket tanks (made of ABS I think) seem to be self supporting on the edge lip whereas custom tanks seem to need a sheet of 1/2" or 3/4" ply underneath. Is this the case?
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Old 11-18-2008, 08:58 PM   #2
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who did you get your custom tanks from.
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Old 11-22-2008, 03:53 PM   #3
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Originally Posted by truckasaurus View Post
I'm in research mode for tank options and am a little confused. Some of the stock sized aftermarket tanks (made of ABS I think) seem to be self supporting on the edge lip whereas custom tanks seem to need a sheet of 1/2" or 3/4" ply underneath. Is this the case?
That's not the case.

Fiberglass tanks have the lip, which is how the tank "pan" and top are joined together.

The fiberglass tanks are supported in the same manner as the ABS tanks.

Andy
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Old 11-23-2008, 11:49 PM   #4
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Still very confused, this supplier says the tanks are ABS and with a supporting lip.

Holding Tanks - Icon Technologies Limited

But I am having trouble finding what I want in this guise so may go with polyethylene and support underneath. Quick question, how much slope does a grey tank need? And could I use the same product for both fresh and grey?
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Old 02-04-2009, 11:03 AM   #5
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Still very confused, this supplier says the tanks are ABS and with a supporting lip.

Holding Tanks - Icon Technologies Limited

But I am having trouble finding what I want in this guise so may go with polyethylene and support underneath. Quick question, how much slope does a grey tank need? And could I use the same product for both fresh and grey?
I'm still shopping for a gray tank(s). What did you decide to use?
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Old 02-04-2009, 11:20 AM   #6
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Hey Vernon, I used this one, from PPL right there close to you in Houston, it's the model# H664:

RV Holding Tanks - 75 Sizes & Dimensions

My welder added in a removeable support member that bolts in and out for easy access in case I ever need to clean or repair it, and the "lip"
or "flange" on two of the other sides fits into the frame rails. It does hang below the belly by about 3 inches at its lowest. Here's my discussion of it on my thread, check post# 462:

http://www.airforums.com/forums/f109...-16692-33.html

Good luck!

-Marcus
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Old 02-04-2009, 12:47 PM   #7
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Might want to take a look at what we did here:

http://www.airforums.com/forums/blog...tallation-144/

and here:

http://www.airforums.com/forums/blog...on-update-166/

Good Luck!
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Old 02-04-2009, 12:52 PM   #8
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Hey Vernon, I used this one, from PPL right there close to you in Houston

Good luck!

-Marcus
I saw that one on their web page. I liked the 30 gal. capacity. But for whatever reason, I am still trying to keep everything above the belly pan if possible. Here is one that I am looking at. However it is smaller and it is extremely pricey for some reason. It is very close to the surface dimensions of yours. I could install two in tandom or isolate one for the galley and one for the shower but using two would be even more expensive.
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