I don't think the pump is a cartridge type that can be twisted out from the assembly, it's one of these
https://www.fisheriessupply.com/rule-11 ... valve-27sa
So I was trying to disconnect the hose so I could remove the whole thing.
The only access I have is through the small circular inspection panel, and I can only get one hand in at a time so i'm also unable to disconnect and diagnose the electrical connections. Maybe there is a way to work through a 6" hole, but I don't have the tools and/or the expertise to do so.
I asked about the warranty hoping the factory would see it and respond, I'll PM them instead,
Thanks for your help.