Mudcat Café message #3577359

The Mudcat Café ^TM
Thread #64044 Message #3577359
Posted By: Mr Happy
20-Nov-13 - 09:46 AM
Thread Name: Tune ADD: Bring Us a Barrel (Keith Marsden)
Subject: RE: Tune Req: Bring Us a Barrel (Keith Marsden)

Just found this

Pin

A pin is equal to half a firkin (4.5 imp gal or 20 l). Plastic versions of these casks are known as "polypins" and are popular in homebrewing. The word "polypin" has subsequently become commonly used in Britain for bag-in-box containers of any size.