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Author Topic: tires, batteries and now sewer lines  (Read 1772 times)
Scott Bennett
Scott & Heather MCI-9
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« Reply #15 on: July 15, 2013, 07:28:41 AM »

Spin,fusion and rod welding are about the same with plastics it's all done with heat spin welding is heat caused by the spinning of the fitting then if fuses together I doubt a spin weld would hold on a tank that old the chemical make up has changed over the years

So true. When I had my fittings spun on, they were very picky about the type of material and matching it up. Only certain ones hold up and if they don't have the right type of plastic, they won't do it. How old is that tank anyway?


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Scott & Heather
1984 MCI9 6V92-turbo with 9 inch roof raise & conversion in progress.
http://www.scottmichaelbennett.com/p/our-bus.html
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chessie4905
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« Reply #16 on: July 15, 2013, 09:30:17 AM »

I'd be leery to weld at the bottom of an old or not holding tank...If that sucker leaks or fails...wrong type of mess to have to deal with; just like cleaning up the mess from those axle seals that eventually leak. Wink Especially so with someone without plastic welding experience.
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GMC h8h 649#028
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Len Silva
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« Reply #17 on: July 15, 2013, 12:28:26 PM »

I would be a bit leery of that myself.  If it were mine and I didn't want to spend the money to replace it (which I wouldn't), I would consider removing the tank, plugging all the existing holes, then turn it around 180 and spin new fittings in.
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luvrbus
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« Reply #18 on: July 15, 2013, 03:42:34 PM »

Treat the tank like you were welding steel a little v grove remove the crust on the tank weld it, with the development of these new plastic welder your major bus converters and Rv manufactures are welding now or using a rubber gourmet  

I have saw rv's 20+ years old with only the rubber gourmet for connections to the tank and no problems with the connections leaking fwiw

He can spin weld his own fitting if he choose to go that route all it takes is a router and some type home made adapter for the fitting to spin it with it's not a brain surgery   
« Last Edit: July 15, 2013, 03:53:19 PM by luvrbus » Logged

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lvmci
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« Reply #19 on: July 15, 2013, 08:55:58 PM »

Hi All, if the polyurethane or whatever the tank is made out of, drys or age changes it in some way that would make it unsuitable to be repaired by welding, I think is what the issue is. So I have made an appointment with Astec tank manufacturing co, in ontario, ca, to take a look at the tank to tell me just that info. I'm hoping it is repairable if not by spin or plastic welding, then by traditional screw and gluing abs sewer pipe, I will let you know as friday is the appointment, thanks so much for the advice and comments, tom, lvmci...
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MCI5A 8V71 Allison MT643
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« Reply #20 on: July 19, 2013, 04:40:45 PM »

Hi All, just got to a park for the nite, traffic on I15 to LV from LA on Friday nite is nuts, will wait till the cool of the morning for the drive home, but good news, went to Astec tank company on the recomendation of someone the vacationing Tom C recomended, after an inspection by Bill and Romeo and within minutes, they spin welded the fitting on to the broken tank, and I was on my way, yes, they said, an aging tank can get brittle or unsuitable for repairs, but apparently not my tank from 1986, for $50 the repair was done with some good advice, thanks to all of you for your advice, and information, tom...
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chessie4905
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« Reply #21 on: July 20, 2013, 03:26:02 AM »

  I'm impressed that they were willing to fool with it. Most mfgs couldn't be bothered.
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GMC h8h 649#028
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