This is a 3d printed ram pump! using 20 feet of polyethylene sprinkler pipe as the charge pipe  with around 2 feet of head pressure it was capable of moving 20 gallons of water per day uphill 20 feet. It would probably do better with a PVC charge pipe. Its suggested to print this on a resin printer, but I have been able to print it on an FDM printer as well though the valve seats need to be smoothed out to seal. the check valves are 5/8 inch viton rubber balls. the o-ring sealing the soda bottle is ¾" ID x 1/8" thick, and the one sealing the waste valve is 1" ID x 1/8" thick. Its recommended to use at minimum a 1 liter bottle on this pump, though a 2 liter is better. 

The treads are designed to have the main body printed leaning over 45*, and the waste valve should be printed upside down.