Hello, Ive encountered the famous ABC problems. So.. Does someone know the o rings sizes that goes in the front valve block? 6 lines with 2 o rings each. Ive found a part number 0159972245. But i want the correct size/diameter/thickness.

Hose/Lines That go into the valve block

The other question is.. Are the valves inside the black epoxy(valves inside) are rebuildable like the old C215 valve blocks. Can i open this somehow. Ive saw a guy who break it but no further instructions.

I see a little leak from the side of the valve unit epoxy cover.