Amtrol WELL-X-TROL manual Minimal pump starts, Choose the amount of protection you need

esp(Effective System Protection):

maximum system output with

minimal pump starts

The ESP sizing procedure covers modern residential water-use habits, increased off-peak demands and the general increase in water use that have occurred over the past twenty-five years. ESP sizing is designed to reduce pump wear and tear, and reduce energy consumption by keeping pump starts to a minimum.

Choose the amount of protection you need.

ESP I: Tank selection is based on approximately one minute minimum pump running time. This is recommended for pumps up to 3/4 H.P.

ESP II: Tank selection is based on approximately two minute minimum pump running time. This is recommended for 3/4 H.P. or larger pumps.

ESP Sizing Table

			OPERATING PRESSURE - PSIG
PUMP DISCHARGE		ESP I			ESP II
RATE GPM (Approx.)	20/40	30/50	40/60	20/40	30/50	40/60
5	WX-202	WX-202	WX-202	WX-202XL	WX-205	WX-205
7	WX-202	WX-202	WX-202XL	WX-205	WX-250	WX-251
10	WX-202XL	WX-205	WX-205	WX-251	WX-251	WX-255
12	WX-205	WX-250	WX-250	WX-251	WX-255	WX-255
15	WX-250	WX-250	WX-251	WX-255	WX-302	WX-350
20	WX-251	WX-251	WX-255	WX-350	WX-350	(2) WX-255
25	WX-251	WX-255	WX-302	(2) WX-251	(2) WX-255	(2) WX-302
30	WX-255	WX-302	WX-350	(2) WX-255	(2) WX-302	(2) WX-350
35	WX-302	WX-350	WX-350	(2) WX-302	(2) WX-350	(2) WX-350
40	WX-350	WX-350	(2) WX-255	(2) WX-350	(2) WX-350	(3) WX-302