On the late fifty’s cruise-a-day tanks, are there two gaskets? There’s the one that’s sandwiched in between the top unit and the tank, but is there also another one in-between the tank and the lower unit?
There is only one gasket. In this diagram the gasket 39 goes between the tank and the push button/handle assembly housing 35. The diaphragm 38 is sandwiched between that and the lower housing 22. image hosting no account
That’s the support that the whole assembly gets screwed on to. It goes underneath, inside the tank. It’s held on by 2 screws (20) and lines up with the rectangular and circular openings and has the threaded holes that the handle assembly screws screw into to hold everything in place.