A Look at Deep Woods Products Stainless Cavern Fermenter

Deep Woods Products produces a line of stainless bottles, growlers and fermenters.  Here’s a look at their 5 gallon (6 gallon capacity) Cavern Fermenter.

 A top down look at the lid
 Bottom side of the lid.  Notice the white o-ring that fits into the lip of the lid.
 I received several extra airlock grommets.  I found it easiest to install the airlock when it is wet.  Installing a dry airlock ended up damaging the grommet.  A sanitizer soaked airlock fixed that problem as it slid in easily without damaging the grommet.
 The Cavern has a plastic ring around the bottom, presumably to protect it from getting dinged or dented.  Good idea.
Here’s a picture of the optional ball valve installed in the lower of two 1/2″ NPT ports. It’s difficult to see in this picture (and in person), but there is what I would call a slight dent between the two ports. I asked the Deep Woods Products about this and was told “We have had a few that have a very slight indentation. This was created when we bored the two ports into the stainless steel. Due to the tension on the stainless steel and the wall thickness this created a slight indentation between the two ports. This will not affect the performance of the cavern one bit. Its more of a cosmetic issue.” At least on the one I have, you really need to look closely to notice this.

 The whole thing assembled.


Included instructions.

This is more of a first looks type post since I haven’t had the chance to try fermenting a beer in my Cavern yet.  I’m looking forward to giving it a try on one of my next batches.

My first impressions are very good.  This is another Deep Woods product that I was wowed by the first time I saw it – stainless bottles being the first.  Considering it’s all stainless construction, this is a relatively inexpensive way to get into fermenting in stainless, as compared to stainless conical fermenters.

These come in 5, 10 and 12 gallon versions.  The 5 gallon version has two ports and the 10 and 12 gallon versions have one port each.

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10 thoughts on “A Look at Deep Woods Products Stainless Cavern Fermenter

  1. Anonymous

    Not sure what a $135 container does that a $45 corny doesn’t, other than have more crevices, cracks, and inability to hold pressure.

    1. Chris Brewer

      This is actually 6 gallons. You can’t easily ferment a 5 gallon batch in a 5 gallon corny. 10 gallon cornies work pretty well (I use two as fermenters) but you’re talking around $300 for those. The cavern also has a ball valve. Both options certainly have their place. It depends on what you’re going for.

  2. Anonymous

    You can unscrew the lid and actually reach your arm in and scrub it out. Also the ball valve on the bottom means you can transfer w/ gravity alone. And the 5 gallon model is actually 6 gallons, so you can ferment a full 5 in it.

    I own two of the 5 gallons ones and the inside welds are very smooth. I love them.

  3. Anonymous

    I boil and ferment 5.5 gallon batches in my 10 gallon cavern. I made an immersion chiller that is “just right” and bought a stainless steal hop spider that fits inside the chiller. I boil with the spider and chiller in the cavern. The bottom is a on the flimsy side for a kettle.

    I will agree that it is pricey for what it is, but having one less vessel to clean and sanitize on my brew day is worth the money.

  4. Anonymous

    Ok, so I am not one for spending that extra dollar on something that I can get by without.
    For years I have been brewing with glass carboys, and I am always extremely careful until I accendently dropped it. This happen just after I worked all morning, brewing my favorite IPA.
    The whole carboy exploded into what seemed like a million pieces all over my garage floor. I was very lucky I didn’t get no more than a few minor cuts on my legs from the flying glass.
    The very next day I purchased 2 of these 5 gallon fermenters. I can honestly say these fermenters are one of the easiest to clean and handle, and besides that I am much more relaxed on my brewing days.

    I will be purchasing 2 more of these or maybe a 12 gallon..trying to decide.

    5 stars to Deep Wood Brew! Great Job Guys

    1. Chris Brewer

      I too have had an issue with a glass carboy. Dropped it down a couple of steps and had glass shoot up into my feet. Not that best brew day ever. I still use glass carboys, but I’m a lot more careful. The Cavern definitely has an edge with regards to safety.

  5. Anonymous

    Other than being more expensive and stainless steel, do these have any advantages over the Speidel Fermenters you detailed the other week?

  6. kflo

    Has anyone tried boiling with one of these on a propane burner? Any luck, or is the bottom to flimsy to handle the direct flame?


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