-Tank was welded with Miller MIG's with tri-mix gas. Not sure on the specs of the ones i used in school but my personal welder i used to work on the tank a bit is a Lincoln Power Mig with tri-mix gas.
-The original plan was to use the Polypropelene as the liner, I was nervous of cracking a seam in the plastic welding. To my own surprise this heat welding method of plastic is very strong. I put the liner in for peace of mind and i'm glad i did just in case of a future seam pop. Pretty unlikely but i'd rather be safe than sorry.
-Heat welded the polypropelene with a heat gun style heat welder. It is a "Stienel 1024 E" model (ill post a pic). You use the same type plastic rod for your material and melt it on similiar to hot glue and welding metal combined. John Ptc made a white tank like this and thats where i got the idea. Factory made tanks are sold/made like this for water storage.
- All the steel was infact for free more or less. I was in my senior year of Columbus College of Art and Design and also worked in the Sculpture Department so I used the tank for a project in Metal Sculpture class and since i worked in the building where the class was held i had acess to everything at my disposal. Sure miss those days!!!!! Steel is through the roof now, It wasent so bad 4-5yrs. ago when i started this project. And i guess not really free i paid my tuition for it so i took everything i could get my hands on haha. I now operate my own buisness and pay full price just like everyone else lol. Steel is still my preferred material of choice
Already welding up a new build. -Also never test filled the poly alone. I did place my window and liner in the tank and test fill my steel structure and poly seams for pressure. I siliconed 3" seams on the poly before placing the liner down so there were not tight corners so it will probably hold water aswell underneath the liner.
