I use these fittings to vent 15-gallon kegs of white wine that I ferment in a freezer. I connect the fitting to an airlock to vent CO2 during fermentation.
I also initially had problems with them breaking when I tightened the connection to a SS lid (similar to the fitting on this cellar keg https://morewinemaking.com/products/morewine-cellar-keg-50-liters.html but w/o the racking tube.). I found that by using the gray Teflon tape (which is thicker than the white) and wrapping the threads several times, the seal could be easily made w/o overtightening the fitting.
Thanks to the previous reviewer, I was quite conscientious of my tightening. A little teflon tape and some care when tightening and no problems. Time will tell how the plastic ages.
.png)
.png)
(1).png)
.png)
