no idea it looks plumbed from the front to the second tank. so you think it suck through.
my three tanks are two forward of the axles and one rear. The third I look at as the front one as its not normally there.. Although on drifter its tank 1.
I was thinking future I run a line and setup a filter tap and use the front for drinking water only.
Then put a grey water in the rear..
Although need to wait for our big trip or free camping, at the moment we go parks only.
Went to have a look at pump see if I could bleed the air, checked and working again
Checked Solar and its working now never showed charging before.. ran radio and everything 12v it got down to 12.9v then started charging. Sunny was getting 6amp in the solar controller is under the bed facing inward. Easier to see