- #1
saxman2u
- 19
- 1
Hi,
I have a rainwater collection system where we have to pump water to the main cistern during a rain event. The system works great the way I have designed it and the rainwater is awesome to use in the house and water the plants and grass. The length of pipe I pump the water is almost 300 feet and elevation is 50 feet to the top our property where the main cistern sits. The main cistern is 15 feet high and I currently pump into the top of the tank, so elevation head is 65 feet of head. I use a 2" SCH40 PVC pipe to pump the water.
I am making some pluming improvements (adding an additional pump line and increase pipe diameter)and was wondering, if I pump into the bottom the tank, does it make that big of a difference if the tank is full of 14 feet of water? I did not know if I could subtract 15 feet of elevation head since I am pumping into the bottom of the tank, but then again, there is 14 feet of water above the bottom of the tank and the inlet that I am pumping into. These tank is 12 feet in diameter.
I currently pump around 85 gallons a minute. Here is the pump curve for the pump I am using.
pentair challenger 3 hp pump curve - Google Search
Thanks for your help.
-S
I have a rainwater collection system where we have to pump water to the main cistern during a rain event. The system works great the way I have designed it and the rainwater is awesome to use in the house and water the plants and grass. The length of pipe I pump the water is almost 300 feet and elevation is 50 feet to the top our property where the main cistern sits. The main cistern is 15 feet high and I currently pump into the top of the tank, so elevation head is 65 feet of head. I use a 2" SCH40 PVC pipe to pump the water.
I am making some pluming improvements (adding an additional pump line and increase pipe diameter)and was wondering, if I pump into the bottom the tank, does it make that big of a difference if the tank is full of 14 feet of water? I did not know if I could subtract 15 feet of elevation head since I am pumping into the bottom of the tank, but then again, there is 14 feet of water above the bottom of the tank and the inlet that I am pumping into. These tank is 12 feet in diameter.
I currently pump around 85 gallons a minute. Here is the pump curve for the pump I am using.
pentair challenger 3 hp pump curve - Google Search
Thanks for your help.
-S
Last edited by a moderator: