|Right hand gauge glasses|
|Gauge Glass Valve arrangement similar to 7109's|
|Steel tube passing down through the upper valve to the lower one|
curved surface of the valve faces matching the curvature of the boiler. I'm glad that new valves with flat faces did not have to be used!
|Lower valve showing close fit around the steel tube|
|Hexagonal glass tube packings (photo from Heritage Steam Supplies' website)|
But how did I know that the seal was not so good...? That will have to wait for my next article (and I promise it will be worth the wait!).