SP R109 seat condition bad?

[Luis H]

I am looking for the rubber diaphram covers, do you have any sources?

My local Scubapro dealer order me some and Scubapro did have them in stock. This was within the last year. I don't know if they still have any. I bought enough to last me a while.

 

[Luis H]

Again, use a diaphragm depressor. It presses against the diaphragm of the 109, not the cover; it is anchored by the cover and has no effect except to spare the seat. The depressor can be left in place for 20 years and not hurt anything. Stop making this hard. Try what AWAP and Aquamaster recommend or go cheap, DIY, whatever and make a seat using a hollow punch.

I have the old paddle that Scubapro used to supply and the little key that goes inside the "S" and only pushes on the diaphragm without distorting the diaphragm cover, but with the balanced adjustable I don't even see a need for any of that. The spring is light enough that the seats seem to last a long time without doing anything special ...that is just my observation, your results may vary.