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Old 04-07-2011, 04:58 PM   #1
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Grey Tank choice - ABS or Polyethylene?

So I am making progress on the design for adding grey tank capacity to my 78 Tradewind. The choice is between vacuum formed ABS tanks or roto molded Polyethylene tanks. Is there a reason to buy one versus the other?

Here's how I see it:

ABS - almost twice the price (~$200+ each)
- I can easily drill out and glue on the fittings

Polyethylene - almost half the price of ABS (~$100+ each)
- Need the vendor to spin-weld the fittings in place (or use the rubber fittings)

And, assuming I properly support the either tank, is one more durable than the other?

Thanks, John H
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Old 04-07-2011, 05:34 PM   #2
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In my Cruiser I want no plastic tanks, everybody 4 is built from chrome steel....
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Old 04-07-2011, 06:05 PM   #3
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Werner ain't play'n.
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Old 04-07-2011, 06:08 PM   #4
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I went ABS because I was not confident that I could get the inlet exactly where it needed to be and can easily add myself.
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Old 04-07-2011, 07:21 PM   #5
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I've got Poly for my gray tank and ABS for my black tank - only because I found 2 different tank sizes to fit in the 2 different existing spaces. I don't know what the advantages or disadvantages are for either. However, I do know that my poly tank "feels" more substantial than the ABS tank.
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Old 04-07-2011, 07:59 PM   #6
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ABS is easier to repair if that is a consideration .
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Old 04-07-2011, 08:12 PM   #7
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Quote:
Originally Posted by johnhh View Post
So I am making progress on the design for adding grey tank capacity to my 78 Tradewind. The choice is between vacuum formed ABS tanks or roto molded Polyethylene tanks. Is there a reason to buy one versus the other?

Here's how I see it:

ABS - almost twice the price (~$200+ each)
- I can easily drill out and glue on the fittings

Polyethylene - almost half the price of ABS (~$100+ each)
- Need the vendor to spin-weld the fittings in place (or use the rubber fittings)

And, assuming I properly support the either tank, is one more durable than the other?

Thanks, John H
I have not installed yet but I got my abs tanks here: RV Surplus
So I could install the fittings where I wanted. I thought the prices were good there to, the shipping hurts a little though.
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Old 04-08-2011, 10:48 AM   #8
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Tinman, thanks for the RVS link. You're right, their prices are good.

The RVS ABS prices are close enough to the poly prices so I'll go with ABS.

Thanks for the help everybody.

John H
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Old 04-08-2011, 11:39 AM   #9
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I've had good luck with this Canadian Company. I purchased their AC shroud with a lifetime warranty. I talked personally with someone there and found them very helpful.

RV waste holding tanks

I'm not sure how their prices compare.

JIM
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Old 04-08-2011, 12:19 PM   #10
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I just quick checked a couple of prices. They are ABS and are typically twice the price or more, of RV Surplus. But they do say 2 days turnaround. RV Surplus is three week turnaround.

John H
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Old 04-08-2011, 06:08 PM   #11
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I just quick checked a couple of prices. They are ABS and are typically twice the price or more, of RV Surplus. But they do say 2 days turnaround. RV Surplus is three week turnaround.

John H
John
It did take all of 4 weeks to get my tanks from rv surplus. I got really tired of looking for tanks.

Doug
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Old 04-08-2011, 06:25 PM   #12
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I only use stainless steal tanks!

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Old 04-11-2011, 01:12 AM   #13
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I am useing these Ronco Plastics - Marine Water Tanks, RV Water Tank, Auto Detail Tanks, Water Tanks for my grey and black tanks. Uwe from Area 63 suggested them.
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Old 04-11-2011, 03:05 AM   #14
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Thank you Todd, I am of the same opinion! DanielB meant about it: "Werner ain't play'n", however I cannot translate this in German.....
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