Thanks for that super fast answer, yes, i understand! Well i was really wrong then!
And i did the same mistake for the alu rings, hopfully, i did not start to turn them! The inner diameter of the PVC tube is 219 and i bought O-rings type 200 X 5! I thought that the O-ring should be compressed (so that it had to be bigger) to insure a water tight tube! If i understansd i should buy something a little smaller as well. Do you have an idea of wich O-ring sascha uses? Sscha, if you read that post...

Thank you.

Hi Cedic,

as far as I know, the outside Diameter is 219. The thickness is about 4 mm. So the inner diameter is about 210. I would buy O-Rings of 196x5 or so... Than the outer Diameter of the Ring is 206mm

ok?

Lothar

Hi,

the Rings I use are 196x5 like Lothar said.

i wrote the message a little too fast, yes, 219 is the outer dimension, i checked the caracteristic of the PVC tube this morning: inner diameter is 209, 5mm thick. Hum, i can't use a 200 X 5 O-ring then... Too big!
OK, thanks for the tip, next time, before buying something, i will ask before.

Thank you very much.

Hallo Cedric,

Für den Kolbentank babe ich 65 X 2,5 mm verbaut Da der Kolben nur 10 mm breit ist, war es einfacher in der Reihenfolge 1,5 mm Rand- 2,5 mm - O Ring - 2 mm Rand - 2,5 mm - O Ring - 1,5 mm Rand zu drehen.

Gruß Mario

Bonjour Cédric
J’ai pour toi 6 O-Ring de 70X2 mm. C’est ce que j’ai dans mes pistons.
A+
Alexandre