Conversion
Table
To Convert From

To

Do This

Parts per million (ppm)

Milligrams per liter (mg/l)

ppm = mg/l

Parts per million

Percent

Multiply ppm x 0.0001

Percent (%)

Parts per million

Multiply percent x 10,000

Gallons per minute (gpm)

Liters per minute (lpm)

Multiply gpm x 3.78

Liters per minute

Gallons per minute

Multiply lpm x 0.2642

Cubic feet (cu ft)

Gallons

Multiply cubic feet x 7.481

Gallons

Cubic feet

Multiply gallons x 0.1337

Fahrenheit

Centigrade

(Fahrenheit 32) x 5/9

Volumetric Flow Rates  Schedule 80 PVC
Pipe
PVC Schedule 80 Nominal
Size

@ 1.5 ft/sec

@ 3.0 ft/sec

@ 5.0 ft/sec

1/4 inch

0.33 gpm

0.67 gpm

1.12 gpm

3/8 inch

0.66 gpm

1.31 gpm

2.19

1/2 inch

1.09 gpm

2.19 gpm

3.65 gpm

3/4 inch

2.02 gpm

4.04 gpm

6.74 gpm

1 inch

3.36 gpm

6.73 gpm

11.21

The flow velocity (V) is dependent upon the
geometry of the conduit through which the fluid flows and is
related to the volumetric flow as shown in the following formula
where Q represents the volumetric flow as cubic feet per second and
A represents the crosssectional area of the conduit in square feet
to yield flow velocity in feet per second. V
=Q/A
Ion Exchange Regeneration
Resin
Type

Regenerate
With

Other
Conditions

Cation

5 lbs Hydrochloric Acid per cubic foot of resin

Rinse to pH 6.5 with high purity water

Anion

15 lbs Sodium Hydroxide per cubic foot of resin

100 degrees Fahrenheit. Rinse to pH 7.5

Softener

6 lbs Sodium Chloride per cubic foot of resin

Rinse free of brine solution

