- Apr 1, 2015
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Saw the in a blog post and in the 4 years I've been brewing, I've never heard the term...
Interesting. This would be used in Low DO homebrewing, I assume?A mash cap is literally a physical cover that sits or floats on top of the mash.
The intent is to retain heat and limit exposure to oxygen while mashing.
It is commonly made from silicone, stainless steel or foam board covered with stainless steel tape but some have simply used a plate or a pizza pan.
In a recirculated mash system (RIMS or HERMS) there may be holes drilled through the mash cap to allow for recirculation.
An interesting thought. I don't know that it would make that much of a difference in a bottling bucket as there are no oxygen scavengers save the yeast. One would need to somehow measure the DO of the beer in the bottling bucket after a period of time - on two different beers being bottled, one with the cap and one without.Wouldn't such a floating cap be a good oxygen barrier for use with a bottling bucket?