I tried using liquid plumbing bridges in multiple set ups and although the machines (attempted with two water filtration machines and one bio distiller) do not show any problem indicators, they will not pump if a bridge is used. Their status just shows "not pumping" but there are no other issues. Filtration material has been delivered, there is an output, everything is powered, etc.
Once I delete the original pathway with the bridge and redo it with no bridges, it works.
I also could not 100% deconstruct the bridges. Even after they were deconstructed, their input/output icons would still show up on the liquid plumbing map.
Set up a water purification unit in smaller space, surrounded mostly by natural blocks. Build pipes to a liquid pump in contaminated water Build pipes with a bridge over the first set of pipes to drip the clean water into a reservoir In my experience, at this point the whole unit will stop pumping