Conti offers two current versions of the Prestina-type group as replacement assays on their parts site. One is listed as the group with no further specification. The other is listed as "9 bar" group. There is a small difference in price between the two.

Does anyone know the difference between the two groups? My guess is that the group with no pressure specification has a softer spring, but that's purely a guess.

Thanks!

Jim

Hi Jim,
I'd guess the spring is the only difference?
There's the normal spring (200600) and 9-bar spring (2006001).
I've been very happy with the original spring, and haven't tried the 9-bar yet.

realdoctor wrote:Conti offers two current versions of the Prestina-type group as replacement assays on their parts site. One is listed as the group with no further specification. The other is listed as "9 bar" group. There is a small difference in price between the two.

Does anyone know the difference between the two groups? My guess is that the group with no pressure specification has a softer spring, but that's purely a guess.

Thanks!

Jim

They still make these new?
I don't see anything on their website.

Found it.
Different name.
https://www.conti-espresso.com/our-products/cc100-pm/

My guess one is a single spring and the other a two spring group.
I like the lower pressure shots more myself.

The 9bar option is a heavier spring. It was a much-welcomed swap in my Prestina.

It was explained to me by someone in the know that the softer spring was mainly used in times gone by in locations around the world that had predominantly Robusta coffees.

Of course.... you can manually assist the softer spring or retard the 9bar spring during the shot by manipulating the lever a tad.

Thanks! I have the old cast brass group and it has had one crack repaired. I am thinking about replacing it if another crack has to be brazed and was checking options with Conti's site.