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	FORUM ON BEER, HOMEBREWING, AND RELATED ISSUES
		Digest Janitor: pbabcock at hbd.org


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Contents:
  What does "Underlet" mean? (Dan Durrett)
  RE: What does "Underlet" mean? (Patrick Babcock)


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Date: Wed, 26 Oct 2011 17:40:19 -0500
From: Dan Durrett <durrettd at cox.net>
Subject: What does "Underlet" mean?

I've heard the term, "underlet" before, but I don't remember what it means.
Is it back-flushing the wort into the bottom of the lauter tun?

Thanks for any clarification.

Dan

- -- 
Dan & Sonnie Durrett
586 L'Ombre Court
Fort Walton Beach, FL 32547

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Date: Thu, 27 Oct 2011 11:14:07 -0400
From: Patrick Babcock <patrick.babcock at gmail.com>
Subject: RE: What does "Underlet" mean?

Greetings, Beerlings! Take me to your lager...

Dan Durrett <durrettd at cox.net> wonders what "underletting the mash" means...

Underletting is to apply pressure into the foundation of the mash tun rather
than on top of the loaded grist. The intent is to "float" the mash and help
prevent compacting of the grist within the mash tun. When I still had time
to brew, I would universally add hot liquor to the mash tun by this method:
I would first flow hot liquor into the tun until it was several inches
 above the false bottom ("strike" water). I would then add my grist slowly,
stirring to ensure no clumping, and adding more hot liquor from beneath the
false bottom to keep the consistency of the mash loose enough to stir and
mix. Once I was satisfied that all of the grist was wetted and that there
were no dry pockets remaining, I would flow the remainder of my strike water
in from beneath the false bottom, "cut" the mash a few times to help loosen
it, then begin my recirculation for the remainder of the mash.

Underletting can be used, too, to loosen a "stuck" or compacted
mash. This can be done by reversing a recirculating pump while cutting the
mash (preferred, if your pump can handle it, your strike water was
sufficient for your desired mash thickness, and your mash is still in
progress), or by adding some of your sparge water - again: from beneath the
false bottom - while cutting. If underletting to relieve a stuck mash during
runoff, be sure to recirculate a bit before restarting your sparge to re-set
your filter bed.

 -
- --
See ya!

Pat "Bruno Moore" Babcock
SE Michigan
HBD Chief Cook & Bottle Washer

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