Bubbler cap

Todays blip is taken in the grounds on the Catalyst Museum in Widnes, unsure what it is but it looks like the cap of a chemical reactor possibly the top section of an ammonia years ago one of my frist jobs was as a chemical plant cleaner at ICI and we had to crawl into reactors and air chisel the ammonia/lime crust formed on the bubbler caps in the 20 odd compartments because we'd worked on the plant for nearly a year by then we were able to work in the amonia atmosphere quite freely but if you had come back from your two week holiday it hit you like a shovel in the face, even so on "dig outs" lkike the ammonia bubbler we wore full face masks with air lines snaking outside the comparment - oh what fun it was to have someone kink your air mask line or set fire to some muslim near your air intake point