Thermometer - Custom Copper Still Mod

Kyle Brown on March 30, 2013

This blog provides information for educational purposes only. Read our complete summary for more info.

How to install a Thermometer in a Copper Still

One of the most common questions we get asked VIA email and over the phone is,"How is a thermometer added to a copper still and where is the best place to install it?"

Watch this video for a full tutorial, but read on for more info and a critical pro tip.

Measure Liquid Temp and/or Vapor Temp with a Permanent Copper Fitting and 3" Thermometer

The absolute best way to add a thermometer to a copper still is to permanently install a 1/2" copper bung and then screw a stainless steel thermometer with 1/2" NPT threads into that. The copper fitting can be soldered into the boiler of the still or soldered into the column with the column thermometer kit. Apply Teflon tape to threads on thermometer and screw thermometer into copper fitting. Hand tighten and then snug with pliers. Do not over tighten!! 
In addition to a boiler thermometer, you may consider a column thermometer as well. Images and links for each are below:

Top Secret Pro Tip: Use a Stepped Drill Bit For Boiler Wall Hole

After we created and published our thermometer video someone emailed us and mentioned that we should use a stepped bit to make the hole for the thermometer in the still boiler wall. If there is a right tool for this job, the stepped drill bit is it! We managed to get by with our tin snips, but it's not the easiest thing to do and also doesn't produce a very clean opening. Stepped bits are self piloting and they make a super clean hole in the copper. We definitely picked one up from the shop after seeing how awesome they are.

Stainless Steel Still Thermometer Options

For those that have one of our 8 gallon stainless steel stills installing thermometers is a very simple process. A distiller will need our 8 gallon stainless steel thermometer combo kit - simply attach the column thermometer with the provided hardware and screw the boiler thermometer into the provided fitting on the still.

Portrait of Kyle Brown
Portrait of Kyle Brown

Kyle Brown

Read Kyle's Articles

Kyle Brown is the owner of Clawhammer Supply, a small scale distillation and brewing equipment company which he founded in 2009. His passion is teaching people about the many uses of distillation equipment as well as how to make beer at home. When he isn't brewing beer or writing about it, you can find him at his local gym or on the running trail.

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56 Comments

  • BS
    Comment Author: bill sheridan

    are the pieces in your kit pre cut or do I just get a flat sheet of copper

  • DP
    Comment Author: David Phelps

    I was thinking the same thing about the stepped drill bit after having to drill many holes in brew pots for beer. What I appreciate is how you guys are humble and accept alternative methods of achieving the end result with less effort instead of being all knowing and arrogant like some sites.

  • DW
    Comment Author: Dan Whitehead

    Interested in buying the 10 gl still kit. However, until I see answers to these questions, not committing. There are very valid questions/concerns which could determine success or failure. Look forward to reading solutions.
    R/S Dan

  • F
    Comment Author: frank

    not sure about ordering a kit from claw hammer cause I’ve been reading the comments posted and no one from clawhammer ever replies. considering taking my business else where if they cant answer a question

  • D
    Comment Author: dan

    When I soldered the bottom on the boiler some solder leaked out to the bottom on the outside. If I use a propane turkey fryer, will it melt the solder?

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Categories

Various beers in glasses

How To Brew

Clear liquor in a rocks glass with a lime wedge

How To Distill

Pouring ingredients into a brewing kit

Try New Recipes

A group of people toasting with steins of beer

Learn From Interviews