Worm tub recommendations

[magnetic_tarantula]

I have roughly 30ft of 3/4" coil, 20ft of 5/8" tubing, 25ft 1/2" tubing. I am wondering how much of that I ought to coil to put into, what looks like a 50gallon plastic barrel? I am designing/building a worm tub for a boiler that may run upwards of a 8kw heating element(s).

[Tater]

Id build it to set 7or so turns 6" in off barrel wall,with biggest size tubing .to 6" in off bottom.with a faucet at top and bottom for adding and removing water

[magnetic_tarantula]

I stand corrected it is a 30 gallon barrel. Do you think 1 will cover it? I have 2 barrels and was thinking of 2 pumps one into and one out to circulate water. Does that seem like it would work?

[Tater]

What size is still ?I use a 15 gallon same size as still and add water slowly as needed in bottom to run out top using this hot water to clean with or as preheated water for next wash/mash

[magnetic_tarantula]

Would you say same volume of cooling water as in boiler?