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I will use a rectangular pipe (65mmx100mm) for growing herbs on the wall outside my house. I want to close both ends of a rectangular PVC pipe without using glue so I can pull at anytime both ends for cleaning purpose.

Does anyone has a good mechanical idea? I'm trying to maintain the cost low so the less parts the better.

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Isn't this really a duplicate question of your last question? There isn't any safety/health reason not to use the non-toxic glue we talked about in you last question. –  shirlock homes Mar 14 '13 at 9:58
    
No, I decided to not use glue so that I can clean the inside –  Juila Mar 15 '13 at 11:52
    
There are caps available for these which will friction fit just like the caps for standard PVC pipe. –  Fiasco Labs Apr 9 '13 at 0:33

3 Answers 3

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Depending on your frequency of cleaning, you can put a bead of silicone around the outside after joining them. You can peel almost all of it off by hand to clean it.

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Cork/Foam/Anything that can be molded to fit the hole snuggly.

Also a they make caps that extend slightly into the pvc pipe., find a rubber seal (old bike inner tube, large rubber band etc..)attach it to the cap, and then shove it in the hole.

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How closed do you need it to be?

You could drill 2-4 bolts through the side to make something of a fence. It would contain dirt, but let water drain out.

Alternately, if there is a proper cap for this pipe, you could drill a single bolt through both the cap and pipe, and hold the cap in place with the bolt.

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