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90* elbow w/ 2-way flap?

treegump

Romans 3:22-24
Messages
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Location
Martinsville, IN
Anyone hear or see anything like a 90* elbow that fits to the bottom of a stack that lets precipitation drain but also directs exhaust out the stack? I used 3.5" solid pipe from napa and flex tubing to make a single stack for my truck (and will put a 4 or 5" pipe from the bed up when I can afford it and when I figure out what I want. (may just use sch40 4"...)), but I don't want precipitation to be sitting in the bottom. (I don't know if that's a concern for anyone else or not...)

Also, anyone have any ideas on how to get around that support underneath the back door of a crewcab? I used the stock pipe, but somehow fanangled it so that it sticks out under the frame rail... I'm hoping I can just find a 3.5" 90* elbow and maybe use flex pipe to connect to the stock straight pipe. Unless someone else has a better idea....
 
You don't need a flap deal, when you do it, make a low place just below the stack in the elbow and drill a "small' hole in the bottom so water can drain out... all my big trucks have this for water to drain out....

And sch 40 will be too heavy I think, try a big truck shop, there are band clamps that will work great for what you are doing, and a steel fab type shop can order tubing for you or a muffler shop, I got a 10' piece of 4" 16gauge for 60$...
 
I thought of putting a rain cap/flapper on, but I have a 45* cut on the stack, so I'm not sure how I'd fit it on.

Also, the only reason I was thinking sch40 pipe was because I don't want to dent my exhaust pipe WHEN I toss an ash or oak log into the bed of my truck. I figured if I went with a thicker/heavier pipe, I wouldn't have to concern myself with protecting it.
 
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