Looking for a pump to drain the left over water water out of tanks. We have tanks that have uneven bottoms and the drain is a one inch pipe the goes over and in the tank to almost the bottom with a check valve. We have been using a ridged wet dry vac to vacuum out the last of the water but after enclosing it all with a geodesic dome I’m trying to find something more practical that I can install outside the dome and just hook a hose up to that will be able to pull the last bit of water out without losing pressure because of air intake. I’ve been looking up a few pumps but have not had experience with any and can not figure out if they will work in this application.