## Calculating the volume of first runnings

“First runnings” are the first liquids to drain out of your mash tun when you’re doing an all-grain batch. The first runnings have the most sugar. Subsequent sparging extracts less and less sugar from the grain. I suppose it’s analogous to using a tea bag a second time.

The first runnings are tempting because they are so thick and rich. Sometimes you want to make a really strong beer just out of the first runnings! But that’s not the only temptation. A buddy of mine and I have tried “hot scotchies” on brew day. You mix some of your first runnings with scotch. It’s a particularly nice treat on a cold brew day because the first runnings are pleasantly warm.

My buddy decided to make a batch exclusively for hot scotchies. He wrote as follows.

I am making a batch of wort just for drinking on brew day. I am shooting for 1 gallon of first runnings. How’s this look? 4.5 lbs of grain, 6.75 quarts of water.

That means he’s going to mash 4.5 lbs of grain with 6.75 quarts of water. The question is how much of that 6.75 quarts will come out with the first runnings — because the grain will absorb some of the water.

His ratios assume a grain absorption of about 0.15 gallons per pound. I.e., 4.5 lbs x 0.15 gallons per pound = 0.675 gallons, which is 2.7 quarts. So he should get just a touch over a gallon of first runnings.

This page says “Average grain absorption is 0.15 gallons per pound. It can vary between 0.1 to 0.2.”

This page has a more complicated equation that includes liquid remaining in the bottom of the mash tun and in the lines or pump. My friend doesn’t use a pump, but there’s always the chance of some liquid will stay in the mash tun — below the level of the spigot.

I suspect that absorption also varies by the type of grain and by how well it’s milled, so I don’t think it’s possible to get the figure exactly right without some experimentation. Everybody’s system will differ a little.

My recommendation was to go with a little more water.

Also, it’s a shame to leave that extra sugar on the grains. He could sparge a couple times and use that for a mild.

## Trying kombucha — and what the heck is a scoby?

Kombucha is a kind of fizzy, slightly fermented, sour tea. It’s supposed to have “probiotics” and all that other healthy stuff, but I don’t pay much attention to that. When I’m sick I go to the doctor.

I like making stuff and I wanted to try my hand at kombucha. First, because it’s crazy expensive in the store, second, because I don’t drink soda (and shouldn’t be drinking beer all the time), and third because … I just like doing that sort of thing. At least once.

My daughter bought me a copy of Emma Christensen’s True Brews, which is a good book to have around the house in case you want to try making anything weird like sake or kephir or … kombucha.

To make kombucha you need a scoby, which is a symbiotic culture of bacteria and yeast. That thing on the plate is the scoby I grew. Essentially it’s a big, gross, slippery fungusy thing that grows in your tea. If that’s over the top for you, don’t try kombucha.

You can buy a scoby from a store, or online, but of course I wanted to grow my own, so I bought a bottle of kombucha from the health food store and used that as a starter. It worked, but it took way longer than I expected. More than two months.

My plan is to make a couple batches of kombucha, but then I’m going to experiment. What would happen, for example, if you used a scoby to ferment a wort?

One thing for you homebrewers to note. The instructions say to use paper towels or cheese cloth to cover the fermenter. “Ah, so primitive,” I thought. I figured I’d improve things by using a fermentation lock.

That was a mistake. You actually need the air flow to make this work. The paper towels (or cheese cloth) are there to keep bugs and dust and cats and things out of your kombucha, but you need the wild bacteria and yeast that’s floating around your house.

## Free advice on home brewing

My Beginner’s Guide to Home Brewing is free today through Tuesday.

This short kindle book is not meant to compete with Papazian or rival any of the really good books out there on home brewing. This is a short, simple introduction. It’s for the people I meet all the time who are curious, but not curious enough to read a long book.

It’s also for the people who have been given a home brewing kit and don’t know what to do with it.

There are a lot of details in brewing and sometimes they can get overwhelming. Beginning brewers often say they worry they’re not worrying about the right things. That’s why they need this book. There are a few things you need to pay attention to, but it’s probably easier than you think. Home brewing ingredients are so good these days that if you’re moderately careful you can make really good beer at home. Without worrying.

If you’re ready to be chill and try your hand at home brewing — without sweating all the little details — then this little book should help.

And …. Right now this book is #1 in two categories on Amazon! Woo hoo.

## So I found this kegerator on Craig’s list …

A friend had a bad night bottling his latest batch and is interested in taking the plunge into kegging — kegerator and all — and wanted to get my opinion of a deal he found on Craigslist.

It’s a kegerator with dual taps and includes 3 five-gallon kegs, a CO2 tank, fittings and such, all for \$350.

In terms of price, here’s what you’d be looking at to buy a new one.

Count on about \$250 for the frig. I use a 4.9 cubit foot Sanyo refrigerator — SR-4912M. It works well, is just the right size, and looks decent. It’s the kind of thing you could keep in your living room.

I should mention that if I was doing it all over again I would get a horizontal freezer. Those things have lots of room and can hold your kegged homebrew and your fermentation vessels so you can do true lagering. You’d have to rig a system to control the temperature, but there’s stuff online about how to do that. But right now we’re just evaluating the basic kegerator deal.

You can do the taps various ways, but I think the nicest is a double tap tower. Here’s one for about \$100. You can spend a lot more than that if you want, and you can spend a lot less with just hoses and thumb taps.

Fittings, hoses and stuff are going to run about \$50.

A reconditioned CO2 canister might cost you \$75.

You’re up to \$475, and that doesn’t include labor, any drill bits or caulk you might need, etc.

So a working kegerator for \$350 isn’t a bad deal.

But how do you know if it’s a bad deal? Here are some things to look out for.

CO2 canisters have a useful life, after which you can’t even get them filled. Here’s a thread on the subject. If you can’t get the canister tested, the simplest thing might be to ask the guy who’s selling it to you when was the last time he got it refilled.

You’ll want to check the frig. Does it get cold? Give it a general once-over — check the power cord, see if the gasket on the door is in good shape, look for breaks in the plastic, etc.

The particular deal my friend was considering includes kegs, so you want to check them too. Do they leak? (I ruined a couple kegs by cleaning them with bleach. Bleach is great for plastic and glass, but never use it on a keg!) Fill the kegs with water and see if they leak. Replacing the rubber gaskets is no biggee. Also, look inside and see if they’re clean. If they’ve been sitting around dirty for a while, that’s not good.

If the kegerator passes all this, and the guy who’s selling it seems like an honest guy (most homebrewers are), you’re probably in good shape.

## SF Lager vs. Safale 05 in a California Common

A few years ago I developed a recipe for a California Common beer, patterned somewhat after Anchor Steam. (The recipe is listed below.) The “correct” yeast for this style is WLP810 – San Francisco Lager.

Over the years I’ve modified it a bit, increasing the Vienna malt, or altering the hops slightly. It’s one of my most consistent crowd-pleasing beers.

However — I’m not a big fan of liquid yeasts. You get way more active yeast cells with dry yeast, and the fermentation starts sooner, which has always been a sign to me of a good batch. I don’t like waiting around for the yeast to get going, and I don’t like making starters. So I’ve made the same beer with Safale 05, and it seemed about the same to me.

But yeasts can make a big difference. A while ago a friend gave me two IPAs that were identical except for the yeast, and I was surprised how different they were. In one, the aroma hops were far more assertive.

So, along with my friend Pigweed, I brewed a double batch of the California Common, split it in two, pitched Safale 05 in one and WLP810 in the other. We did a head to head comparison last night.

There wasn’t that much difference. The WLP810 gave it a slightly more crisp flavor. But it wasn’t that noticeable, and, in my opinion, not worth the trouble (or cost) of using the liquid yeast.

Here’s the basic recipe. You can use 7 pounds of 2-row and 3 of Vienna if you prefer. One time I actually used all 10 pounds of Vienna, and it wasn’t that different.

8 # American 2-row
2 # Vienna
1 # Crystal (60)
1 ounce Northern Brewer (60 min)
1 ounce Northern Brewer (30 min)