MHD

Yep. mine is the old style longer scrubber with the spot welds. You can just see the spots welds externally if you look carefully. They appear externally as 5 1.5 cm long raised lines on the surface of the scrubber.

I did get 2 hits with the unit Overseas as Rick mentioned and on that trip I forgot the filling aid that set the height and probably over filled the scrubber, resulting in a slight deformation of the end plate mentioned. I also was using a very fine sorb that blocked the mesh holes, that resulted in increased resistance to the normal gas flow, resulting in a bypass route being more attractive to the gas. End result two scary CO2 hits.
At least I know why the hits came on so fast now.

Mine fails the water test very badly. One point the water pours through. Looking at how bad it is I suggest the bottom has been deformed over time.

I have pretty much parked my unit since the hits for various reasons.
For the record mine is a 1999 Mares sold unit that came to Australia via England (came with a guy who emigrated). There is no serial number on the unit.

Cant say I am impressed, I picked the Azi for supposedly the construction quality of the scrubber. To find it so badly flawed in a life threatening way really pisses me off.

Matt