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PUMP PERFORMANCE
CURVE
MODEL 503
14
45
40
12
35
10
30
8
25
20
6
60 PSI
15
40 PSI
4
10
2
5
0
5
10
15
GALLONS
LITERS 0
20
40
60
FLOW PER MINUTE
CONDITION
PUMP WILL NOT START
A
OR RUN
B
PUMP STARTS TOO SOON Float "ON" point is adjusted too low. Refer to STEP 2.
PUMP WILL NOT SHUT
C
OFF
PUMP OPERATES BUT
D
DELIVERS LITTLE OR NO
WATER
PERFORMANCE CHARACTERISTICS
MODEL
Feet
5
10
15
20
25
30
35
80 PSI
40
Shut-off Head:
Pump capacity varies due to: Inlet Water Pressure, Working Water Pressure, Discharge
Elevation, Number of Pipe Fittings, Inlet and Outlet Pipe Size, Fluid Viscosity, Degree of Water
Clarity, Water Temperature. The flow rates in the chart are approximate values.
NOTE: Some districts may require a reduced pressure principle backflow preventer per ASSE
Standards 1013. Check Local Codes.
20
25
device suitable for the installation, in accordance with the local plumbing code, such as a
reduced pressure principle backflow preventer (RP). Alternately, consult the local plumbing
80
and health codes or the authority having jurisdiction for guidance on cross-connection and
backflow protection requirements.
Troubleshooting Guide
POSSIBLE CAUSE
Inadequate incoming water
pressure.
Excessive incoming water
pressure.
Debris around Intake.
Float hung up on pit or primary
pump
Float is obstructed.
Float "OFF" point is adjusted too low.
Foot Valve above water level.
Internal valve diaphragm vent
hole is plugged with debris.
Water level in sump pit was
below foot valve when pump was
activated.
Debris around Intake.
Inadequate incoming water
pressure.
Blockage in discharge pipe.
Foot Valve above water level.
Vertical lift too high.
© Copyright 2015 Zoeller
TOTAL DYNAMIC HEAD/FLOW
TOTAL DYNAMIC HEAD/FLOW
PER MINUTE
PER MINUTE
DEWATERING ONLY
DEWATERING ONLY
40 PSI
Meters
Gal.
Liters
1.5
12.7
48.1
3.0
12.7
48.1
4.6
7.4
28.0
6.1
2.0
7.6
7.6
-
-
9.1
-
-
10.7
-
-
12.2
-
-
22.0 ft. (6.7m)
34.0 ft. (10.4m)
Sump water is non-potable. To reduce the risk of contamination of the potable
water supply, the Home Guard
®
REMEDY
Check incoming water line for closed valve, low water
pressure or clogged filter/strainer.
Install regulator and reduce pressure below 100 PSI
with valve closed.
Clear debris from pit and foot valve strainer.
Move pumps so that the floats move freely and do not
contact pit, piping or each other.
Inspect float operation and correct problem.
Refer to STEP 2.
Adjust Float - Refer to STEP 2.
Turn off water supply to pump and back on repeatedly
to dislodge debris. If this process does not remedy
the problem, service pump to clear debris or replace
valve assembly.
Turn off water supply to pump. Fill pit with water until
the foot valve is submerged. Turn on water supply
and activate float by hand. Allow pump to run for 3-5
seconds and release float before the foot valve is
above the water level. Pump should shut off normally.
Clear debris from pit and foot valve strainer.
Check incoming water line for closed valve or low
water pressure.
Remove pipe and flush out debris.
Adjust Float - Refer to STEP 2.
Change discharge piping or contact technical service.
Co. All rights reserved.
®
6
503
60 PSI
80 PSI
Gal.
Gal.
Liters
Liters
19.0
72.0
20.0
75.7
19.0
72.0
20.0
75.7
15.0
56.8
20.0
75.7
11.1
42.0
20.0
75.7
7.1
26.9
15.3
57.9
3.2
12.1
10.9
41.3
-
-
6.4
24.2
-
-
1.8
6.8
42.0 ft. (12.8m)
Max must be installed with a listed backflow
018586
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