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Question:

Water Pumps: What "Head" and "Lift"?

I was looking at a water pump and the specs said 110 Foot Max. Total Head and 20 Foot Max. Suction Lift. Can someone please explain this? Thanks.

Answer:

I have two ponds, one that is always full and one that is always low. They are 550 ft apart and there is a change in upward elevation of about 35ft. What pump is needed to allow me to transfer water from the lower pond to the upper pond?
Head is the height over the pump location that a pump can push water, suction lift is the depth it can lift it from. Picture a 130' well with the pump 20' from the bottom and 110' from the top- in that case it will pump it... but without a volume factor (how much is going to flow) it's impossible to determine whether you'll get a trickle or a flow with those conditions.The store or manufacturer should be able to supply that info. Also the heights are relevant to sea level (or actual location above sea level) not necessarily the pipe length.

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