11
Installation
How to size water supply piping for Wascomat coin laundries
1. Calculate the total number of gallons of water that would be needed if all present (and
future) washers were to fill at the same time. Assume the W75 (18-lb.) uses 7 gallons
per fill; W105 (25-lb.) uses 10 gallons per fill; W125 (35-lb.) uses 14 gallons per fill‚
W185 (80-lb.) uses 20 gallons per fill; and W244 (75-lb.) uses 30 gallons per fill. If
water pipe runs of 70 feet or longer are required, multiply by 1.25 to compensate for
pipe friction which reduces flow rates.
2. Using the Flow Chart below and knowing the water pressure in the water main at your
store, select a pipe diameter that has a gallons per minute (gpm) flow rate the same or
higher than the total calculated above. The hot water line and the cold water line
supplying the washers must
each be this size diameter, since many fills are all hot or
all cold. This will assure fill times of approximately 1 minute and normal cycle times.
Wascomat washers are designed to operate at 25–85 PSI Call your local water utility
company if you do not know the water pressure in your water main.
GALLONS PER MINUTE FLOW CHART
Pipe internal Water pressure from the water main
Diameter, Inches 25 psi 40 psi 60 psi 80 psi
1/2 21 gpm 27 gpm 33 gpm 37 gpm
3/4 36 46 56 64
1 63 85 104 120
1-1/4 112 148 181 208
1-1/2 160 210 257 297
1-3/4 209 273 334 385
2 257 335 410 473
2-1/2 419 548 670 772
3 580 760 930 1070
3-1/2 650 840 1025 1185
4 720 920 1120 1300
5 1500 1960 2400 2770
6 1930 2530 3100 3580
3. The water line from the laundry to the water main in the street must carry
double the
total gallons capacity calculated in paragraph 1. Select the correct diameter from the
Flow Chart. (You will note from the chart that two 2'' pipes do
not equal the flow rate of
a 4 inch pipe; two 1'' pipes do
not equal the flow rate of a 2 inch pipe, etc... Use the
correct gpm flow rates!)
To Next Page
Loading...