NormanS
Well-Known Member
Sight glass
Sight glasses are often fitted with a push button "normally closed" valve, so that if anything happens to the glass or perspex or plastic tube, no more than a tubefull can escape.
Ahhh! You could be right, mitiempo!
It currently has a clear perspex shield positioned around it which gives good protection but your suggestion is good. I think I might leave it as is for now because of that.
Sight glasses are often fitted with a push button "normally closed" valve, so that if anything happens to the glass or perspex or plastic tube, no more than a tubefull can escape.