JonboyUSMC's Lava Tanks

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debb

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Aug 12, 2010
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in the nj woods
I don't want to hijack this thread but I'll explain how to add the fill port to ANY tank. Use a 3/16" drill and drill a hole just below the top cap. A slow speed drill works better but any will do. Now take a 4-40 x 1/8" Machine Screw like this one Stainless Steel Machine Screw, Black Oxide Finish, Pan Head, Phillips Drive, #4-40, 1/8" Length (Pack of 10) | SmallParts.com and slowly screw it into the hole. It will self-tap the hole. Unscrew it and clean up any stray pieces of poly. Screw it back in. Done! This was originally done by Gummy Bear. I took a chance on an old tube and it worked so well I was amazed. I know people are thinking "Won't it strip the poly with repeated use". well I haven't had one strip on me yet. It just screws in and out without a hitch. There is zero leakage as well. Once you do one you'll be kicking yourself for not trying this sooner.
I use a blunt tip syringe to fill the tank but any needle tip bottle will work just fine.

awesome...thanks..:)
 
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