jonniex
Contributor
i'd really like to know more abut it.
any info would be appreciated!
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thanks a lot for your help DA Aquamaster!DA Aquamaster:It is either an R109 Adjustable or an R156 Balanced Adjustable. The name was screen printed on the metal purge cover and may still be faintly visible.
Otherwise it is impossible to tell one from the other from an external inspection. You woudl need to remove the adjustment knob and see whether there is a balance chamber and balanced poppet present.
If it is an R109 it can be upgraded to R156 status very easily and inexpensively.