Northern Brewer Sight Glass and Thermometer Fitting for Coolers

1. Drill a 3/8” hole through the cooler wall.
2. Put one washer and one o-ring on the coupler nipple; holding the coupler inside the cooler, put the nipple through the hole. The o-ring should be against the cooler wall.
3. Put the other o-ring on the nipple on the outside of the cooler; push it against the cooler wall, and then put the other washer on the nipple.
4. Thread the tee onto the nipple on the outside of the cooler. Hold the coupler stationary inside the cooler with pliers and tighten the tee from the outside until snug. Align the tee so that the brass compression fitting is pointing up.
5. Place the sight glass into the compression fitting at the top of the tee and mark desired height. While the sight glass is in place, mark the cooler for placement of the eyebolt.
6. Remove the sight tubing and cut to desired length.
7. Install the eyebolt by screwing into exterior cooler wall.
8. Slide the sight glass through the eyebolt and then into the top compression fitting and tighten.
9. If the fitting will be used for a sight glass only, remove the second compression fitting and install the plug.
10. If the fitting will be used for a thermometer as well, slip the thermometer stem through the brass compression nut and the small washer and o-rings. Omit the washer if the stem is larger than 3/16”.
11. Pass thermometer stem through nipple and hand tighten the compression nut.