INSTALLATION
ADDITIONAL INSTALLATION
MATERIALS (Purchase Separately)
Two-inch (2”) plastic or steel pipe, fittings or clamps needed
to do your job. We recommend a check valve, Sears stock
no. 2791.
THE SUMP
Figure 1 shows a typical sewage sealed sump basin.
Minimum sump basin size is 18” diameter. Consult local
codes for your operation, such as cover requirements, and
venting.
PUMP INSTALLATION (Figure 1)
Set the pump on the bottom of the sump, making sure that
it sits solidly and is level. Never place pump directly on
earth, clay, or gravel surfaces. Be sure there is enough space
around the pump to allow the switch free movement as the
sump sewage level changes.
PIPING
Use 2” or larger plastic or steel pipe. Run the discharge pipe
to the nearest sewer outlet or other point of disposal. Use
the most direct route and the fewest turns and elbows pos-
sible.
Use Teflon tape to seal threads in plastic pipe. Hand tighten
only.
The rate of flow in the discharge pipe must keep any solids
present in suspension in the fluid. To meet minimum flow
requirements (2 feet per second in discharge line), size pipe
as follows:
A Pipe Size Of:
Will Handle a Flow Rate Of:
2”
21 GPM
2-1/2”
30 GPM
3”
48 GPM
Drill a 3/16” hole in discharge pipe about 1-2” above pump
discharge connection (but below check valve) to prevent
airlocking the pump.
CHECK VALVE (Figure 1)
To avoid backflow into sump when pump shuts off, install
a Sears check valve, stock no. 2791 as follows:
1. Provide 5-1/2” spacing in desired horizontal position in 2”
discharge line.
2. Slide rubber sleeves onto both ends of check valve and
tighten clamps.
3. Insert discharge pipe ends into rubber sleeves and tighten
clamps.
4. Run pump to be sure there are no leaks.
3
664 0194
2" Discharge
Pipe
2" Check
Valve
Clamp
(4 Req'd)
Vent according to
local plumbing codes
Gate Valve to close
system for servicing.
Make sure valve does
not restrict flow.
GFCI
115V outlet
Sewage
On
18-in. Minimum
Diameter Sealed Basin.
5-1/2 in. pipe spacing
Automatic Float Switch
Off
3/16"
Vent Hole
Figure 1
