Is it safe to soak kegs with w5 when not in use over night or longer?
You shouldn't need to I normally half fill 2 hours then invert and it's spotless after a big rinse.
Every 2nd or 3 fill I do a complete strip down
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Thanks CH, I'll give that a go tonight
No worries, sorry should have said red hot water if you can or at least over 60 to activate the w5
I've 6 of my own to strip and do the same later, learnt the hard way a couple of years ago to put the bits for each keg in little marge tubs rather than just throw the whole lot in a bucket for cleaning, each second hand Keg has its own little personality and the bastards are not always compatible or universal!
I know, I made that mistake too!
I have left kegs soaking for a day or two. Between 40 and 60 ℃ is the best temp for it.
There are enzymes in it so just like your mash avoid over 70.
Cheers beerfly, good to know. I usually use a downstairs electric shower for instant hot water to clean them. But I have been know to use boiling water too. I'll know to avoid that next time.
What are the issues going over 70 Beerfly?
Quote from: CH on April 13, 2016, 12:17:22 AM
What are the issues going over 70 Beerfly?
Denaturing of the enzymes i'd imagine. W5 is a laundry detergent, so it probably has protease, lipidase and our friendly neighbourhood amylase. Temps a little bit over 70C will kill any enzyme before it can do it's job but they work best in the range of 30 to high 60's celsius, same as in a mash. Rinsing with boiling water after soaking in W5 would be good to get rid of any residue after the W5 has done it's job
aparently the enzyme is Protease. Optimal at 42C
Its purpose is "protein catabolism by hydrolysis of the peptide bonds that link amino acids together in a polypeptide chain"
in other words it breaks proteins into smaller bits. Like breaking a chain by cutting some links.
Handy for our gut to make stuff more easily digestible or for getting poop out of nappies etc
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Gee I did not know this,goes to show you never stop learning :)
yep what they said
And poop out of baby gro's....I discovered this recently. The Missus is delighted I Homebrew now!