Performance

While we do show a performance curve for the Energy Saving Pump many if not most people fail to realize that the column does not show gallons per minute (GPM), but rather the product of GPM x Pumphead. Therefore, interpretations based solely on GPM only are totally wrong.

The reason it is so difficult to answer the questions about flow rates without using our computer program is as you turn down the Energy Saving Pump's RPM not only does the flow rate change, but so does the pumphead. As the pumphead decreases dramatically (theoretically as the square of the RPM ratio) the flow rate actually increases because of the reduced pumphead. On the other hand the flow rate normally is a linear function of the RPM. Our computer program takes both of these variables into account based on the actual pond layout, i.e., length and diameter of pipes, type of filter, static lift, flow rates, etc.. So it actually calculates the change in the pumphead and flow rates.

These calculations are different for each pond's layout. This is of course why the "assumptions" about flow rates made by some are totally inaccurate without taking the above factors into consideration.

Dial Setting	RPM	GPM x FT Pump Head*	Horsepower	230 V Amps	HP
100.0%	3,450	3,990	1.000	2.60	1
95.0%	3,278	3,421	0.857	2.23
90.9%	3,134	2,992	0.750	1.95	3/4
90.0%	3,105	2,909	0.729	1.90
85.0%	2,933	2,450	0.614	1.60
80.0%	2,760	2,043	0.512	1.33
79.5%	2,743	2,005	0.502	1.31	1/2
75.0%	2,588	1,683	0.422	1.10
70.0%	2,415	1,369	0.343	0.89
69.4%	2,394	1,334	0.334	0.87	1/3
65.0%	2,243	1,096	0.275	0.71
63.0%	2,174	998	0.250	0.65	1/4
60.0%	2,070	862	0.216	0.56
55.0%	1,898	664	0.166	0.43	1/6
50.0%	1,725	499	0.125	0.33	1/8
45.0%	1,553	364	0.091	0.24
40.0%	1,380	255	0.064	0.17
39.7%	1,370	250	0.063	0.16	1/16
35.0%	1,208	171	0.043	0.11
30.0%	1,035	108	0.027	0.07
25.0%	863	62	0.016	0.04
20.0%	690	32	0.008	0.02
15.0%	518	13	0.003	0.01
10.0%	345	4	0.001	0.00
5.0%	173	0	0.000	0.00
0.0%	-	0	0.000	0.00

This table shows how the variable horsepower 1 HP Energy Saving Pump® works as you turn down the dial. The GPM x Feet (Pump head or TDH') column allows you to see the main water horsepower (WHP)* component. If you divide it by the GPM you will get the Pump head, and vice versa.