Useful Data
Welcome to Lincoln!
SWIMMING POOL CALCULATIONS
WEIGHTS AND MEASURES
One cubic foot of water contains 7.48 gallons.
One cubic foot of water weighs 62.2 pounds.
One gallon of water weighs 8.32 pounds.
One gallon equals four quarts.
One part per million (ppm) represents 8.32 pounds of
chemical per million gallons of water.
One pound psi equals 2.31 feet of head.
One inch of mercury equals 1.13 feet of head.
We appreciate the opportunity to serve you by meeting your commercial swimming pool
equipment and aquatic supply needs. We are very aware there is one reason why we are
one of the largest swimming pool equipment distributors in the country, and that reason
is you.
Since 1954, Lincoln has served commercial swimming pool operators like you. For over
60 years, our reputation has been built by our knowledgeable staff, by providing
customers with prompt personal service, and by carrying the highest quality products
available. In addition, it remains our goal to offer those products at the best prices
anywhere, delivering you the best value available.
METRIC EQUIVALENTS
1 meter = 39.37 inches
3.2808 feet
1.0936 yards
1 foot = .3048 meters
1 yard = .9144 meters
1 gallon = 3.785 liters
1 liter = .2642 gallons
HIGH RATE SAND FILTERS — 15 gallons per minute per square foot
maximum.
RECTANGULAR OR SQUARE POOLS
Volume = Length x Width x Average Depth x 7.48
RAPID SAND FILTERS — 3 gallons per minute per square foot maximum.
ROUND POOLS
Volume = r2 x π (3.14) x Average Depth x 7.48
TO DETERMINE SQUARE FOOTAGE OF FILTER AREA REQUIRED:
Pool gallonage ÷ 60 minutes ÷ Pool turnover rate (number of hours) ÷
Filtration rate (gpm per square foot of filter area) = Square foot filter area
required.
Customer satisfaction remains our top priority. Our knowledgeable staff is available to
serve you and answer any questions you may have. We appreciate your business and
pledge to do our best to meet your needs and exceed your expectations.
IDEAL POOL CHEMICAL CONTROL
CONTROL
MIN. PPM
IDEAL
MAX. PPM
Chlorine, Free Chlorine
1.0
1.5
3.0
1.5
2.0
4.0
Bromine
1.5
2.5
5.0
Sincerely,
SATURATION INDEX = pH + TF + CF + AF - 12.1
TF
CALCIUM
HARDNESS
EXPRESSED
AS PPM
CaC03
32
0.0
37
0.1
TEMP
ºF
pH
7.2
7.5
7.8
Total Alkalinity
60
120
200
Calcium Hardness
50
150
500
Cyanuric Acid
15
30
100
Dissolved Solids
0
200-1,000
1,500
NOTE: Check with your local Health Department for their water
chemistry requirements in your area.
NUMERICAL VALUES FOR FORMULA
$8.00
WATER CHEMISTRY
Chlorine with Cyanuric Acid
We look forward to being your supplier now and in the future!
Federal Supply
Schedule
Contract No.
GS-07F-9449G
Length x Width x Inches of water lost x .625 = Gallons of water
PRE-COAT
Continuous feed — .1 pounds per square foot of filter area.
Non-continuous feed — .15 pounds per square foot of filter area.
MAXIMUM COAT OF D.E. — Seven times the amount of pre-coat (for
pressure D.E. filter).
Call Toll Free
(800 ) 223-5450 FAX ( 888 ) 680-2825
www.lincolnaquatics.com
WATER LOSS
DIATOMACEOUS EARTH FILTERS
FILTER CYCLE — Add 2.5 pounds of D.E. per turnover for 100,000
gallon pool (continuous feed).
Charles R. Luecker
President & CEO
AREA OF A CIRCLE
Area = π r2
Area = 3.14 x r2
POOL GALLONAGES
DIATOMACEOUS EARTH FILTERS — With continuous feed of D.E.,
2.0 gallons per minute per square foot maximum.
Due to space limitations and the technical nature of many of our products, it is not
possible to have them all listed in this catalog. Please contact us for any specific products
you desire. We will be happy to provide you with detailed literature and parts lists for
each of the products we carry.
AREA OF A SQUARE OR RECTANGLE
Area = Length x Width
FILTER SIZING
CARTRIDGE FILTERS — .375 gallons per minute per square foot
maximum.
Our catalog contains the most comprehensive selection of high quality swimming pool
equipment and aquatic supplies available in the industry today. We have organized our
catalog in an easy-to-use format that will help you quickly locate the products you want.
The Lincoln name is recognized around the world for providing customers with quality
products and superior service at competitive prices.
POOL SURFACE AREA
CF
TOTAL
ALKALINITY
EXPRESSED
AS PPM
CaC03
AF
5
0.3
5
0.7
25
1.0
25
1.4
PARTS PER MILLION CALCULATION
46
0.2
50
1.3
50
1.7
53
0.3
75
1.5
75
1.9
60
0.4
100
1.6
100
2.0
66
0.5
150
1.8
150
2.2
76
0.6
200
1.9
200
2.3
84
0.7
300
2.1
300
2.5
94
0.8
400
2.2
400
2.6
105
0.9
800
2.5
800
2.9
128
1.0
1,000
2.6
1,000
3.0
FOR 100% CHEMICAL STRENGTH
Pool Volume (gallons) x 8.32 pounds per gallon
1,000,000
=
Pounds for
1 ppm
FOR LESS THAN 100% CHEMICAL STRENGTH
P 1 pound of chlorine gas
1 gallon of liquid chlorine (sodium hypochlorite)
1.54 pounds of dry chlorine (calcium hypochlorite)
1.8 pounds of S.D.I.C. (sodium dichlor)
SUPER CHLORINATION
Super chlorination = 10 times the weight of the chloramines.
SODA ASH — To maintain pH, add continuously 1.25 to 1.50 pounds of
soda ash for each pound of chlorine gas used. Ideal soda ash solution is
3-6%, with a maximum solution of 12%.
SOLUTION TANK FORMULA — Soda ash tank gallons x 8.32 Ibs. per
gallon x desired soda ash solution percentage = pounds of soda ash for
solution.
INFORMATION RESOURCES
Centers for Disease Control (CDC) — www.cdc.gov
Model Aquatic Health Code (MAHC)
www.cdc.gov/healthywater/swimming/pools/mahc
National Swimming Pool Foundation — www.nspf.org
TOLL FREE (800) 223-5450
California Dept. of Environmental Health
www.cdph.ca.gov
California Swimming Pool Regulations
http://www.cdph.ca.gov/HealthInfo/EnvironHealth/Water/
Pages/CaliforniaPublicSwimmingPoolRequirements.aspx