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The weldless kit is the easiest solution for a completely fresh vessel but many brewers have already outfitted their vessels with couplings that have been welded in. The simple solution is a basic street elbow as shown in the picture. This kit has several options depending on what you have on your kettle already.
Includes:
19" Polycarbonate Tubing rated to 250F*
Stainless Hardware
Black Vinyl Numbers for each gallon mark from 2 to 15.(5-50 liter also available, contact me)
3" long eye bolt (may or may not be long enough depending on how you weld your coupling in).
19" length with 1-15 calibration numbers standard, other options available.
*Note: standard length is 19" and these are the ones that are in stock and ready to ship right away. Extended lengths of 24 and 36" may incur 2-4 days of additional lead time.
Install Requirements:
This kit requires that you already have a coupling installed in the lower sidewall of your vessel (or want to have one welded in). The threads on this kit are 1/4" NPT. You can pick up a 1/4" NPT half coupling or 1/4" NPT weld spud and thread this kit right in. If you already have a 1/2" NPT threaded coupling welded into your vessel, you will need to pick up a 1/2" MNPT x 1/4" NPT hex reducing bushing to adapt the threads. All of these fittings are available in the NPT threaded fittings area.
Put a few turns of teflon tape on the threads of the sight glass elbow and thread it in until the clear tubing is vertical and the fitting is snug and leak free.
CALIBRATION INSTRUCTIONS for all kit types:
1. Level the vessel, apply a vertical piece of masking tape to the side of the tube, and add a carefully measure gallon of water at a time noting each gallon on the tape. Empty the vessel and remove the sight glass. Cut the number strip into individual numbers, remove the rigid paper off the number, apply at the correct level on the tube. Remove the clear top masking leaving ONLY the black vinyl number behind. (It's probably better to view the video to get this). If you are adventurous, you can apply the decals directly to the sight glass while calibrating the level, but we find it's much easier to get a clean straight application with the tube laying down horizontally.
2. If you make a mistake applying the vinyl numbers, you should be able to scrape them off with your fingernail without damaging the tubing. However, do NOT use any solvents or adhesive removers except for rubbing alcohol on a paper towel and some elbow grease. Unfortunately if this happens, you'll have to buy another strip of numbers.
LENGTH TRIMMING INSTRUCTIONS for all kit types:
If after initial installation you find the tubing is sticking up past the top of the vessel, you may want to trim it flush to make it look better and avoid snagging.
1. Mark the cut line with a sharpie marker or piece of tape. WARNING, if you are using tape to mark the cut line, be sure to note which edge represents the cut line or you may cut the tubing short by whatever the thickness of the tape is.
2. Remove the kit from the vessel, laying the tubing down on a piece of cloth to avoid scratching, and cut the tubing with a hack saw or other fine-toothed trim saw. You can also use a tubing cutter designed for copper pipe to make a score cut around the tubing and then snapping it.
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Love the simple, straightforward construction 
