ziptron
Materials
- Dec 9, 2010
- 64
Hi Everyone,
I'm using a Dri-Prime Pump (close-coupled centrifugal pump with vacuum priming compressor) and I am using it to suck (and then pump) water out of a water storage pond at approximately 1000 GPM through a 12 inch PVC pipe. The pond is deep and has plenty of water, the pipe inlet within the pond is located approximately 250 ft away from where the pump is and I only have approximately 2 ft difference in elevation between the top of the pond and the connection point. So basically, I am trying to suck water up two feet and across about 250 ft. The pump is rated to lift 28' so even if its not 100%, I think I am in the clear.
It is an older system and it has worked in the past, but recently I am finding that even though my technicians can get it to prime and pump some water out, they suddenly lose prime and nothing seems to come out of the pump. They indicate that this happens at random. I've tried a different pump so the physical pump/priming system of the pump does not seem to be the issue. I cannot inspect the pipe as it is underground, however I cannot imagine anything happening within the underground pipe itself which will allow me to start pumping, but then suddenly lose prime. If I had a plug, I shouldn't be able to prime at all right? If I had a partial clog, I should be able to pump but at a lower GPM.. Yes, I get water out.. but then lose it.. Any ideas what is happening?
Any idea what I may be missing?
I'm using a Dri-Prime Pump (close-coupled centrifugal pump with vacuum priming compressor) and I am using it to suck (and then pump) water out of a water storage pond at approximately 1000 GPM through a 12 inch PVC pipe. The pond is deep and has plenty of water, the pipe inlet within the pond is located approximately 250 ft away from where the pump is and I only have approximately 2 ft difference in elevation between the top of the pond and the connection point. So basically, I am trying to suck water up two feet and across about 250 ft. The pump is rated to lift 28' so even if its not 100%, I think I am in the clear.
It is an older system and it has worked in the past, but recently I am finding that even though my technicians can get it to prime and pump some water out, they suddenly lose prime and nothing seems to come out of the pump. They indicate that this happens at random. I've tried a different pump so the physical pump/priming system of the pump does not seem to be the issue. I cannot inspect the pipe as it is underground, however I cannot imagine anything happening within the underground pipe itself which will allow me to start pumping, but then suddenly lose prime. If I had a plug, I shouldn't be able to prime at all right? If I had a partial clog, I should be able to pump but at a lower GPM.. Yes, I get water out.. but then lose it.. Any ideas what is happening?
Any idea what I may be missing?
