So you no doubt have gazed upon the ultra cheap 5 and 10 gallon mash tun conversion for igloo type round coolers.
The average cost for these items, cooler not included, runs somewhere in the area of $25. But, being a super cheap ass, I have found a way to make it even cheaper.
First you begin with a 5 gallon rubbermaid cooler. I found mine from some Australian ex-pat who was selling them on Craigslist. I paid maybe $10 for it.
Next you must remove the spigot. It has a washer on the inside of it. Remove washer. Observe size of hole. It is just a hair under 3/4". Ah ha! I said. I have a spigot I got from labelpeelers
. $2.21 for it.
The spigot fits into the hole left in the side of the cooler. If you ram it in there, twisting as you go, it will poke through the other side. In most other conversions, there is a ball valve recommended. This is the most expensive part. It's like $8 or $10. So now I just saved you $6.
Since the spigot has a male 3/4" attachment, I found a brass garden hose fitting in the plumbing section of Lowes. It has a standard garden hose on one side and 1/2" brass barb on the other. $4.50.
Now, find a 12" section of stainless braided supply line. Lead free. $5 for it.
I snipped both ends off, and pushed the tubing out. Take one end and slide it over the brass barb. Zip tie in place. Take the other frayed end and fold it over on itself. Zip tie.
Total cost, exclusive of cooler, about $12.
Braided supply line.