WHY would you have 'tennis balls' in your Waste Tank??
POOP (even a Large one) will NOT clog up the inlet to macerator
Liquid to POOP ratio....needs to be high ---water is your friend
When POOPing fill toilet bowl BEFORE you flush then let a couple seconds of water flow when you flush
POOP when wet (EVEN a LARGE one0 will soften, turn gooey and flow right into that macerator and be ground up into small pieces of poop that will then be pumped out the discharge hose (use 3/4" Garden Hose)
I have had a Flojet Portable since 2008....pumps 75' with a 2' rise W/O issue
Then when done pumping connect another garden hose and flush clean water thru it to clear pump and discharge hose
I take mine apart at end of season and check the cutter blade (steel) and the Impeller (rubber)-----clean up any hair etc.
Done
But keep the tennis balls out of waste tanks
