[Chavez324]

Looking to make a 10 gal batch from a 5 gal recipe. Do I just multiply all the ingredients by 2?

[fmader]

Don't multiply your water by two. You still boil off at the same rate. With everything else, I would say yes.

[duboman]

Basically yes but IME you will lose a little efficiency in your mash with the larger grain bill

This is assuming you're doing all grain:)

[Chavez324]

I was gonna be using 13.125 gal water w 35lbs of grain. Doin a Dreadnaught clone, shooting for an O.G. of 1084 @ 90 min boil.

[ynotbrusum]

You have a long boil here, so be aware of the fact that most boil off rates are per hour.  Plus with that much grain, your absorption will be pretty high - something like 30 pints....

[AmandaK]

The hops are a bit different. Use IBUs and scale the amounts from there. Plenty of good calculators on the internet, like brewersfriend.com

[larsonkd]

Make sure you have a plan for the volume of wort you are producing.  Using a 10-12 gallon carboy is best to keep the wort together as a whole...but make sure you have some help as the end product will be VERY heavy for a one man lift. I usually keep my 12 gallon carboy on a dolly, so once complete I can roll it away.

If you split the batch into two five/six gallon buckets or carboys, I recommend using a 'T' connector to get even collection of the wort from beginning of collection to end in both buckets/carboys.

[liquidbrewing]

The last time a fellow brewer and I collaborated,  I wanted to try my "T", into two carboys, our flow promptly slowed to stop.  I don't recommend it!

[AmandaK]

The last time a fellow brewer and I collaborated,  I wanted to try my "T", into two carboys, our flow promptly slowed to stop.  I don't recommend it!

Would a "Y" connection have been better? (I'm thinking that the T didn't work due to turbulence.)