Have a remote filter and I plumbed the Accusump into the outlet side of filter. According to installation data, this eliminates need for the check valve, as backflow valve in filter acts as a check valve.
I purchased the 2 qt electric unit due to space restraints. I have pre-lubed the engine without the Accusump and will pre-lube with it to check for leaks, keep system lubed, etc.
Great piece of kit and looks super installed.
Hank
FFR 1776