Hayward Pool Pump Selection Guide

AQUA

Swimming Pool Supplies

Selecting a Hayward Pool Pump

Note: The information provided here is intended as a guide in helping customers determine which size pump will be suitable for an existing swimming pool. The steps outlined below will allow you to roughly gauge which Hayward pump is most suitable for your pool. For additional information on Hayward pool pumps contact: www.haywardnet.com

Determine the surface area of your swimming pool or spa

Step1

Select which one of the above pool shapes closesly resemble your pool and calculate gallons of water in your pool using one of the formulas below:

Step 2

Gallons of water in pool:

Rectangular Pool:		L x W x 7.5
Kidney-shaped Pool:		(A+B) x L x 0.45 x 6.9
Circular Pool:		R x R x 3.14 x 5.5
		L= length; W= Width; A&B= Width; R=Radius

Step 3

Calculate the Flow Rate (GPM):

All shape type pools

Gallons x 480 (@ 8 hours turnover rate)

Step 4

Determine your pool systems smallest pipe sizes for suction and discharge and make sure the GPM you calculated above does not exceed the Max GPM rating for your pipe as indicated in the table to the right.

Maximum GPM

Pipe Size	Max GPM
2"	85
2.5"	120
3"	180
4"	305

Step 5

With a clean filter, record the filter pressure (psi), then multiply it times 2.31 to obtain Feet of Discharge Head (PS) Pressure-side Head Loss= psi x 2.31

Use the table to the right to estimate Suction-side Head Loss (SS):____

Total Head Loss = PS + SS

Suction-side Head Loss (SS)

Pump HP	Feet of water
3/4 hp	4.5 - 5.5 ft.
1 hp	7 - 9 ft.
1.5 hp	10.0 - 12.5 ft.
2 hp	13.5 - 16.0 ft.
3 hp	14.0 - 17.0 ft.

Step 6

Using the Hayward Pool Pumps performance curve provided below, determine which pump's performance curve comes closest to matching the point where the system's GPM (step 4) intersects the Total Head Loss (step 5).

Max-Flo pump performance curve