Im mostly recovered from the latest bout of kidney stones, but life is still happening around me, so this will be another short post.
I will respond to all the earlier posts eventually!
Aquatec 'tech support' doesnt know as much about their pumps as I do! Grrrrrr. I did manage to find out that (almost) all their pumps are adjustable up/down from the nominal pressure. But no one at Aquatec could say what the range was. "Probably" at least 20 PSI - at a guess. Maybe. Also, its possible that the ONLY difference between the different models is the spring in the bypass valve - maybe. He thinks.
The website is hopeless because they make "custom" pumps for pretty much anyone, then they seem to make a new PDF "data sheet" for that pump - but it may or may not actually apply to that pump only - maybe. He thinks.
So, its possible you could buy any 8800 series pump and turn up the pressure to the max of 160 PSI on the bypass by either changing the screw or spring - maybe. Of course, you need one of the pumos that has the bypass pressure control option - maybe. He's not sure about the pumps that dont have that option - maybe.
He did leave me on hold for 15 minutes while he checked with other people who should know these answers - but finally came back with no one was sure.... but maybe......
He gave me a link to a company that sells all their pumps - but it turns out that company doesnt sell them any more.
Grrrrrrrrrrr I hate stupid people who decide to work in customer support and stupid companies that hire stupid people to work for them.
Anyway, I found a pump at Freshwater systems that has the correct specs - maybe. Probably. I hope.
Im in no rush now though. Even if I started the new seedling in the system today, it wouldnt be ready to harvest until mid june. That will be too hot for me to keep rez and tent temps within reason. So, I have lots of time to get the pump, clean and re-build the chamber etc.