I went out to test the 3/4″ hydraulic Ram Pump for minimum head. (Remember that you can buy pre assembled pumps here at land to house.) I have been filling up my 55 gallon drum with my 1-1/4″ ram pump with 5 feet of head. This setup allows the drum to be filled in less than an hour but I have moved the pump for watering my garden. So instead of moving the big pump I thought I might as well set up the small pump and see what it can work on. Check out this video of the 3/4″ pump working with only 1′ of head. Now I always say that the ram pump has a 1 to 7 ratio meaning that every 1′ of head falling into the pump you will get 7′ of water pumped. In this case there was a lift of more than 8′ but you will notice that the water is very much pulsing.