Spec Sheet

Models 281, 283 14"
Model 287 10"
The Model 283 features a fully adjustable wide-angle float switch. Differential
adjustments can be made easily by tethering the float switch to the discharge
pipe or other mounting point. Vertical float switch Model 287 is not adjustable.
Model 280
Manual,
no float switch
Model 281
Wide-angle
float switch
with Quick-
connect
Model 283
Wide-angle
float switch
with series
(piggyback)
plug
Model 287
VMF-Series
Vertical magnetic
float switch for
smaller pits – will
operate in a 10"
diameter sump
Liberty Pumps - 7000 Apple Tree Avenue - Bergen, New York 14416
Phone [phone] - Fax [phone] - LibertyPumps.com
Copyright © Liberty Pumps, Inc. 2020 All rights reserved. LLIT002000-R01/20
Specifications subject to change without notice.
Performance Curve
Motor Specifications
1/2 hp 8A (115V) 4A (208/230V)
Oil-Filled; Thermally Protected
(PSC) Permanent Split Capacitor
Dimensional Data
Weight: 29 lbs
Height: 13"
Major Width: 10" (Model 287)
Cord Lengths
MODEL 10' 25'(-2) 35'(-3) 50'(-5)
280 Standard Optional Optional Optional
281 Standard Optional Optional Optional
283 Standard Optional Optional N/A
287 Standard Optional N/A N/A
Minimum Sump Diameters
Effluent Models Sump Models
280-Series
FACTORY SWITCH
SETTINGS
MODELS
281 & 283
MODEL
287
Turn on level 13" 9.5"
Turn o level 7" 4"
10' cord length standard on all models. For optional lengths, add “-2, -3
or -5” sux to model number.
Example: for model 280 with 35' cord, order 280-3
Liters Per Minute
US Gallons Per Minute
Total Head in Feet
Total Head in Meters
0
10
5
20
15
30
35
25
40
0
3.0
1.5
6.1
4.6
9.1
10.7
7.6
12.2
15 20 25 30 35 40 45 50 55 60 65 7050
10
56.8 75.7 94.6 113.6 132.5 151.4 170.3 189.3 208.2 227.1 246.1 265.018.90
37.9
60 Hz, 3450 RPM
Impeller
Paint
Max Fluid Temperature
Vortex style engineered polymer
Powder coat
140°F (60°C) Intermittent
104°F (40°C) Continuous duty
Motor Housing
Power Cord Type
Class 25 cast iron
SJTW (10' and 15' models)
SJTOOW (35' and 50' models)
Shaft
Stainless
Bearings
Hardware
Mechanical Shaft Seal
Upper and lower ball bearings
Stainless
Unitized ceramic carbon