|
|
04-07-2011, 03:58 PM
|
#1
|
2 Rivet Member
1967 22' Safari
1978 25' Tradewind
NEW LENOX
, Illinois
Join Date: Nov 2007
Posts: 88
|
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
|
|
|
04-07-2011, 04:34 PM
|
#2
|
3 Rivet Member
Currently Looking...
OO
, OO
Join Date: Dec 2009
Posts: 174
|
In my Cruiser I want no plastic tanks, everybody 4 is built from chrome steel....
Werner
|
|
|
04-07-2011, 05:05 PM
|
#3
|
Rivet Master
1974 31' Excella 500
Charleston
, South Carolina
Join Date: Nov 2010
Posts: 1,073
|
Werner ain't play'n.
__________________
As I grow older, I pay less attention to what men say. I just watch what they do.
- Andrew Carnegie
|
|
|
04-07-2011, 05:08 PM
|
#4
|
Rivet Master
1967 24' Tradewind
Greenville
, South Carolina
Join Date: Jan 2009
Posts: 1,107
|
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.
|
|
|
04-07-2011, 06:21 PM
|
#5
|
Rivet Master
1951 21' Flying Cloud
1960 24' Tradewind
Folsom
, California
Join Date: Dec 2003
Posts: 727
|
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.
__________________
Aluminumbskull with Led Balloon in Drag
***
Birch Plywood and Aluminum go together like
Peanut Butter and Chocolate
|
|
|
04-07-2011, 06:59 PM
|
#6
|
Rivet Master
1976 25' Caravanner
Vintage Kin Owner
Campton
, New Hampshire
Join Date: Feb 2006
Posts: 1,113
|
ABS is easier to repair if that is a consideration .
|
|
|
04-07-2011, 07:12 PM
|
#7
|
Rivet Master
1954 25' Cruiser
Currently Looking...
Cruisin
, Wisconsin
Join Date: Sep 2008
Posts: 683
|
Quote:
Originally Posted by johnhh
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.
|
|
|
04-08-2011, 09:48 AM
|
#8
|
2 Rivet Member
1967 22' Safari
1978 25' Tradewind
NEW LENOX
, Illinois
Join Date: Nov 2007
Posts: 88
|
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
|
|
|
04-08-2011, 10:39 AM
|
#9
|
3 Rivet Member
1997 30' Limited
Omaha
, Nebraska
Join Date: Aug 2009
Posts: 116
|
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
__________________
Rig: '97 30' Limited
Towed by: '19 Silverado 2500 Duramax
WBCCI #22116
|
|
|
04-08-2011, 11:19 AM
|
#10
|
2 Rivet Member
1967 22' Safari
1978 25' Tradewind
NEW LENOX
, Illinois
Join Date: Nov 2007
Posts: 88
|
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
|
|
|
04-08-2011, 05:08 PM
|
#11
|
Rivet Master
1954 25' Cruiser
Currently Looking...
Cruisin
, Wisconsin
Join Date: Sep 2008
Posts: 683
|
Quote:
Originally Posted by johnhh
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
|
|
|
04-08-2011, 05:25 PM
|
#12
|
Rivet Master
Commercial Member
1962 19' Globetrotter
1963 19' Globetrotter
1961 19' Globetrotter
Wheat Ridge
, Colorado
Join Date: Dec 2007
Posts: 624
|
I only use stainless steal tanks!
Todd
__________________
www.VINSTREAM.com
Wheat Ridge, Colorado
WBCCI # 1962
Instagram #Vinstream
|
|
|
04-11-2011, 12:12 AM
|
#13
|
Tool Hoarder
Currently Looking...
West
, California
Join Date: May 2010
Posts: 907
|
|
|
|
04-11-2011, 02:05 AM
|
#14
|
3 Rivet Member
Currently Looking...
OO
, OO
Join Date: Dec 2009
Posts: 174
|
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.....
|
|
|
04-11-2011, 05:41 AM
|
#15
|
Always learning
1972 29' Ambassador
1962 19' Globetrotter
1951 21' Flying Cloud
Central
, Texas
Join Date: Oct 2010
Posts: 2,881
|
Quote:
Originally Posted by marzboy
|
I'm using the same tank from Ronco. I have two gray and one black tank. The total was around $500 to my door.
http://www.airforums.com/forums/f36/...tml#post947725
__________________
Lance
Work is never done, so take time to play!
|
|
|
04-11-2011, 08:15 AM
|
#16
|
1 Rivet Member
Join Date: Jan 2003
Posts: 6
|
Edge and corner thickness is kind of critical because this is often where they receive mechanical stress. ABS vacuum molded tanks are thinner at corners and edges because they are drawn over a mold while being heated. Roto-molded tanks are actually thicker at corners and edges because they are literally rotated in a mold.
|
|
|
04-14-2011, 03:19 PM
|
#17
|
2 Rivet Member
1967 22' Safari
1978 25' Tradewind
NEW LENOX
, Illinois
Join Date: Nov 2007
Posts: 88
|
I am having a difficult time with this ABS versus Polyethylene tank choice. Today I am really thinking to go with poly... However, I really want to use the rubber fittings rather than order the tanks with fittings spin-welded.
You are supposed to use a butyl caulk with the rubber fitting.
Anybody have problems with the rubber fittings leaking?
In my design I will have a 5" deep tank and a 6" deep tank. When the 6" deep tank is full the water height will be above the 5" deep tank. In other words I will 'over-fill' the 5" tank which will put the rubber fitting 'under water' by a 1" water column, 2" if water backs up into the shower pan. The tank guys say 'no problemo' but I don't know.
Anybody had a bad experience with the rubber fittings?
Thanks, John H
|
|
|
04-14-2011, 05:40 PM
|
#19
|
Rivet Master
1951 21' Flying Cloud
1960 24' Tradewind
Folsom
, California
Join Date: Dec 2003
Posts: 727
|
So is there a sealant we can use with the poly . . . And/or will the butyl caulk be "water tight"?
And a separate question (for Jammer):
Those fittings look great but how do you get the piece that goes inside the tank . . . in the tank (w/out drilling a larger hole somewhere else (sounds like a "dumb question")?
Seems like it would only work for small connections - where you could install the inside piece through the large drain hole.
__________________
Aluminumbskull with Led Balloon in Drag
***
Birch Plywood and Aluminum go together like
Peanut Butter and Chocolate
|
|
|
04-20-2012, 01:58 PM
|
#20
|
4 Rivet Member
1974 31' Sovereign
Sunset Beach
, North Carolina
Join Date: May 2010
Posts: 402
|
How will the weather affect these tanks?
My factory poly black tank is in an enclosure with insulation and a heat source. From the pictures I have seen, the ABS will be exposed on the bottom. Is there a freeze risk?
I am about to order a black and a gray, not sure which way to go....as usual.
|
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
Thread Tools |
Search this Thread |
|
|
Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|