Pro/Forums - View Single Post - Common pump P-Q Curves (graph inside)

sevisehda · 07-02-2003, 08:12 PM

I need to get a new pump as my old one is dieing(or at least making plenty of noise). The cheapest pump I've seen is a VIA AQUA for 18.49. But the stores min online purchase is 30$ so sshould I either get 2 VIA AQUA 1300's for 37$ or get a Danner Mag3 for 36$.

Also I know theroretically 2 pumps in series is double the pressure and 2 in parallel is double the flow. But in the REAL world more double the pressure actually means double the possible head so flow would actually increase. And for parallel doubleing the flow would actually create more resistance which would decrease flow. Not even taking into account that its not actually 1 + 1 = 2 but6 slightly less. The previsous period is confusing I know but so is the math behind it. Does anyone have any formulas or rules of thumb for calculating flow using multiple pumps? Thanks for any help.

07-02-2003, 08:12 PM	#19
sevisehda Cooling Savant Join Date: May 2003 Location: NY Posts: 234	I need to get a new pump as my old one is dieing(or at least making plenty of noise). The cheapest pump I've seen is a VIA AQUA for 18.49. But the stores min online purchase is 30$ so sshould I either get 2 VIA AQUA 1300's for 37$ or get a Danner Mag3 for 36$. Also I know theroretically 2 pumps in series is double the pressure and 2 in parallel is double the flow. But in the REAL world more double the pressure actually means double the possible head so flow would actually increase. And for parallel doubleing the flow would actually create more resistance which would decrease flow. Not even taking into account that its not actually 1 + 1 = 2 but6 slightly less. The previsous period is confusing I know but so is the math behind it. Does anyone have any formulas or rules of thumb for calculating flow using multiple pumps? Thanks for any help.