Inside...

Inside a rather narrow airvessel.
Siete is cleaning the inside one of the main airvessels. We recieved a new gasket for the manhole cover because we could not fix the cover properly anymore; it kept leaking air.
A good opportunity to clean the inside a bit.
But after we managed to put the cover in place (It's a heavy thing) and tightened the nuts it still leaked a tiny bit. So loosened it again and now wait for liquid gasket to arrive. In the extra: the manhole cover; the airvessel was manufactured in 1949....