For cooling in my DIY microbrewery, i wanted to have two spirals, one for HERMS circulation, one for wort cooling.
Copper is the choice for me, because i want to lower the price of the micro-brewery, and also that copper heat conductivity is 20x bigger than stainless [wiki].
Durability of the surface was not priority because i will not brew 24/7. Cleaning in citric acid. I bought 5m of Cu pipe for 515 CZK which is heat conductivity equivalent of 100m of stainless steel.
Parameters: 12x 1 mm half-hard pipe 5m eshop
I read from some net forums, that to prevent pipe kinking, one can use sand, water or salt.
Salt appeared to be good choice, because you can dissolve it later. I thought that.
By help of funnel i pour salt inside and by knocking and vibrating by vibration grinder put the salt deeper inside.
Pak obtočil kolem kanalizační roury. (s pomocí manželky, která mě obcházela kolem dokola :D)
Afterwards i tried to get the salt out, but... it was not possible. Pressured water, knocking or event putting in hot bathtub for 2 hours was no help. If there is no water flow inside, just near the salt, nothing is going on probably.
At the end, very desperate, i've connected garden hose and opened the valve. Then I've close it. After 1-2 hours i opened the valve again and hurrayyy, pipe coughed and was free! (probably capillar elevation)
P.S. Afterwards i found that i was not only one with that problem
here the author got the salt out by use of pressure air.
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