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Author Topic: BUILDING AN UNDERWATER VIEWING TUBE  (Read 13036 times)

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Offline deserdog

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« on: December 14, 2008, 09:47:54 AM »
Building an underwater viewing tube is pretty easy. Here is a picture of one that I built.

Here is a list of material that yo will need to build one.
3 inch abs pipe(The ones I built are 24 inchs long plus the coupling.)
2 3 inch abs couplings
1 4 1/2 inch by 1/2 inch carriage bolt
Short piece of 1/2 inch pvc
Plexiglass disc 3 7/16 inches in diameter
Abs glue
Clear silicon caulking

I usually build these tubes with a length of 24 inchs. They can be made shorter. So first cut your 3 inch abs pipe to the length you want.

The next step is to take one of the 3 inch abs couplings and cut it into 2 equal sections. When it is cut, you need to remove the ridge of material inside the cupling so that it can slide all of the way onto the piece of 3 inch abs pipe. You want a fairly tight fit, but you want to be able to slide the couple down the pipe. Make a mark several places on the 3 inch piece of pipe, 6 inchs down form one end. These marks are were the coupling will stop. Now slide the 1/2 coupling onto the pipe. Leave it about an inch or so from the mark. Take theabs glue and put some glue between the 1/2 coupling and the marks on the pipe. Now slide the 1/2 coupling down to the marks. Wipe off any excess glue. When the glue is set, take a file and file a spot on the 1/2 coupling flat, this is where the handle will mount. When you have the spot filed, drill and tap for the 1/2 inch bolt. Screw the bolt into the hole until you can just see the end of the bolt inside the pipe. Now measure the distance between the flange on the carriage bolt the the flat spot on the 1/2 coupling. Cut your piece of 1/2 inch pvc about an 1/8 inch longer than this. Now gently heat one end of the 1/2 inch pipe until it is slightly pliable. DO NOT BURN IT!!! When the 1/2 inch pipe is slightly pliable, slide the heated end over the carriage bolt, and then turn the bolt into the hole. The pliable pipe will conform to the carriage bolt.

The next step is to take the whole 3 inch coupling mark out the center and put a ling around the coupling. You want to drill 6 1/2 inch holes on one side of the ridge that is in the middle of the coupling. DO NOT DRILL THE HOLES THROUGH THE RIDGE!! When you have the holes drilled and cleaned up, you are ready to put the plexiglass disc into place. Take your silicon caulk and put a small bead of caulk all the way around the ridge inside the coupling. MAKE SURE YOU PUT THE CAULK ON THE UNDRILLED SIDE OF THE RIDGE!! When you have the bead of caulk down, place the disc inside the coupling and press gently down onto the caulk. Now run a small bead of caulk on top of the disc. After the caulk is set, you can glue the coupling onto the end of the pipe. Wipe off any excess glue. Now run another bead of caulk on the other side of the disc, on the coupling side with the drilled holes.
Cannot find if you do not look!

Offline auhunter

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« Reply #1 on: December 22, 2008, 09:19:03 PM »
Another great build & tutorial!!

Offline Chuxgold

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« Reply #2 on: January 26, 2009, 02:08:48 AM »
 If you can find a magnifying glass that will fit a peace of pipe cut down to fit tight in the tube. But loose enough to still slide. With it you can magnify what your looking at with out bending over. I built one and used it for finding things even out of the water like screws and this pin out of my gun one time. Vary cool with the magnifying glass.   
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