ghostlymoron
Well-Known Member
As a former student and practitioner of hydraulics, I enjoyed Jumbleduck's lucid explanation. ?
How to measure 'head' on a submersible pump
- Thread starter CLB
- Start date
JumbleDuck
Well-Known Member
Good for you. But as long as you produce ... eccentric ... statements in materials science and fluid dynamics inter alia, and then refuse to discuss or justify them, you'll forgive me if I treat the claims with a little hesitation. I am quite sure that others can make up their own minds.
CLB
Well-Known Member
Thank you all. Who thought buying a pond pump could be so complex 
I appreciate that there is far more to pump dynamics than can be understood by the laymen here, and even enough for those in the know to disagree with each other, but I am happy that I have an answer that I think I can work with. If I lose a few LPH in the process, I can live with that.
Put simply I have a filter that can handle a flow of 8000lph, but it will be about 1m above the surface of the pond. I was simply trying to work out if the 10,000 lph pump would be the one to deliver 8000lph after the head. The answer is that with a 1m head it will deliver 9000lph and with a 2m head it delivers about 7500lph. The 8000lph model delivers 7000lph with 1m head.
Looks like what I really need is a 9000lph model.
I appreciate that there is far more to pump dynamics than can be understood by the laymen here, and even enough for those in the know to disagree with each other, but I am happy that I have an answer that I think I can work with. If I lose a few LPH in the process, I can live with that.
Put simply I have a filter that can handle a flow of 8000lph, but it will be about 1m above the surface of the pond. I was simply trying to work out if the 10,000 lph pump would be the one to deliver 8000lph after the head. The answer is that with a 1m head it will deliver 9000lph and with a 2m head it delivers about 7500lph. The 8000lph model delivers 7000lph with 1m head.
Looks like what I really need is a 9000lph model.