Oh yes, that's an other problem. I have the old Coltri filter tower and added the (new) PMV. In the beginning it worked well, then the lower o-ring broke. Never seen this kind of o-ring dammage, it seemed to be cut. No superficial dammage but clear cut. I measured an found out tower's sealing surfce is a bit lower than PMV's o-ring groove. O-ring is "sealing" on cone (leading to sealing surface) that's not good at all, we have a gap which of couse kills the o-ring. A larger o-ring is not the solution, gap is the problem. Thank to my lathe I was able to make the PMV fit, now o-ring is on sealing surface.
This has nothing to with the other problem: PMV itself is leaking a little bit. I had a closer look to the sealing insinde the PMV, its metal to metal. In my opintion this can not seal completely. No teflon seat, no o-ring, just metal to metal.
It seems Coltri is accepting a small blow by which of course leads to draining the filter after use. This leads to unneccessary load change and a filter tower without pressure. Nobody wants this, Grantmac described the reason why.
So it seems I have to live whith this blow by.
I hate Coltri.......
