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BLACK TANK TUBE HANGER
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TEDDY View Drop Down
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Joined: 22 Oct 2017
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Posts: 94 		Post Options Post Options   Quote TEDDY Quote  Post ReplyReply Direct Link To This Post Topic: BLACK TANK TUBE HANGER
    Posted: 10 Nov 2020 at 12:18pm
Tks, GlueGuy - is the clevis hanger two U shapes that would allow the end of the tube to bounce up and down, with the upper limit being the bolt holding the U ends together?  Or does that bolt sit right on top of the tube?  I guess the assembly could move up and down on the vertical bolt holding the top U to the strap.
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GlueGuy View Drop Down
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Posts: 2654 		Post Options Post Options   Quote GlueGuy Quote  Post ReplyReply Direct Link To This Post Posted: 10 Nov 2020 at 10:49am
We installed a clevis hanger and left the original strap in place. We used a smaller hanger for the gray water drain tube.
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TEDDY View Drop Down
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Posts: 94 		Post Options Post Options   Quote TEDDY Quote  Post ReplyReply Direct Link To This Post Posted: 10 Nov 2020 at 10:00am
An elegant solution, TCJ - but it looks like you have additional strap support to the gray and black tank..... my 178 black discharge tube has only the strap at the end of the tube at the frame and, of course, I have  separate black and gray tubes.  The gray tank tube has not been a problem - it's a stout strap and doesn't seem to flex.  Your solution looks like the description StephenH gave using a 1/8" alluminum strap, only your rubber belt strip would certainly support the tube end.

Still leaning toward the aluminum strap, pipe clamps and a rubber sleeve under the pipe clamp.
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tcj View Drop Down
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Posts: 141 		Post Options Post Options   Quote tcj Quote  Post ReplyReply Direct Link To This Post Posted: 10 Nov 2020 at 8:53am
I cut this "safety" strap from a piece of conveyor belt from a potato processing plant.  My original use of this belting was to make a limit strap for a snowmobile slide suspension.  They take a lot of abuse and the original broke.  Yamaha wanted about $20.00 for a new one.  A two foot by three foot piece of this belting cost about $3.00.  The strap I made for the snowmobile had been on it for about 15 years and was still in good shape when I sold it.

I used an arch punch to punch the bolt hole.
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TEDDY View Drop Down
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Posts: 94 		Post Options Post Options   Quote TEDDY Quote  Post ReplyReply Direct Link To This Post Posted: 10 Nov 2020 at 7:10am
OK- here's what I'm gonna do .......

1/8" Aluminum bar/strap.  Two bends - one to turn  up a 1/2" tip, and then one 1-1/2" behind that.

I'll use two stainless pipe clamps (the kind that has the helical notches and you turn a screw to tighten) in the U formed by the two bends.  

Before I tighten the clamps, I'll make a sleeve out of garage door bottom weather strip - the part that is glued to the concrete, not the part that slides into the door bottom.   The clamps will tighten around that sleeve.

Then I'll use the existing holes in the R-Pod frame and screw the top (un-bent) portion of the strap into  the frame using lots of Loc-Tite.

If that doesn't work I'm gonna remove the tube from the bottom of the black tank and replace it with a stopper that I can control from the TV and let the tank drain as I travel on the Interstate!

Thanks for all the ideas...... this is a great forum...
Teddy
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Posts: 44 		Post Options Post Options   Quote wthoms2000 Quote  Post ReplyReply Direct Link To This Post Posted: 10 Nov 2020 at 2:35am
I used Zinc Steel Punched Flat Bar, a thick version of plumbers tape, and attached it to a bolt on the black water drain. Very solid and will not brake!

https://photos.app.goo.gl/bnAchiotAfqAgAwX9/

Good luck!
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TEDDY View Drop Down
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Posts: 94 		Post Options Post Options   Quote TEDDY Quote  Post ReplyReply Direct Link To This Post Posted: 09 Nov 2020 at 5:33pm
I tried some stainless pipe strapping - comes in a roll, holes pre-punched in it.  That fractured, too - didn't last much longer than the original steel strap that, once removed from the R-Pod, you could bend between your fingers of one hand!

Thanks for the info on aluminum.  I think I'll try that, maybe with a 1/4" thick rubber collar.  All ideas welcome!
Teddy
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Posts: 5290 		Post Options Post Options   Quote offgrid Quote  Post ReplyReply Direct Link To This Post Posted: 09 Nov 2020 at 4:02pm
2024 aluminum alloy is probably the most commonly used in aircraft. It is great for resisting fatigue cracking, not as good as say 6061 for corrosion resistance. Note that most airplanes are painted for corrosion protection and kept in hangars so resistance to fatigue cracking is more important. Airplanes kept outside for a long time tend to have corrosion issues (ask me how I know). 

6061 is probably the most common Al alloy in general use and so probably what you get down at the big box. Since corrosion is a big problem on the bottom or rpods I'd lean toward 6061, but you could argue it either way.  

Temper is specified by a number suffix for aluminum, so you can for example get 2024 T0 or 6061 T6. Higher is stronger but less ductile. I wouldn't want a high temper material for this because you're going to need to be able to bend it to make a strap.

Or, you can use stainless steel strapping, that's what I did. 
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TEDDY View Drop Down
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Posts: 94 		Post Options Post Options   Quote TEDDY Quote  Post ReplyReply Direct Link To This Post Posted: 09 Nov 2020 at 3:10pm
Thanks again, Stephen.
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StephenH View Drop Down
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Posts: 6326 		Post Options Post Options   Quote StephenH Quote  Post ReplyReply Direct Link To This Post Posted: 09 Nov 2020 at 1:01pm
It was anodized strap aluminum purchased at Lowe's. It was approximately 1/8" thick. I did the same thing with the gray water tank drain.
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