Sears 390.2521 - Manual (Page 4)

INSTALLATION
INSTALLATION
Piping in the Well
The Shallow Well Water System can be installed on a dug
well, drilled well or with a driven point. In a dug or cased
well, a foot valve and strainer should be installed for easy
priming. It should be installed five to ten feet below the low­
est level to which the water will drop while the pump is op­
erating (pumping water level). To keep sediment from
clogging the strainer, be sure it is five to ten feet above the
bottom of the well. Before installing the foot valve, make
sure that it works freely.
When using a foot valve, a priming tee and plug as shown in
Figure 1, are recommended.
Priming Plug,
Priming Tee
(User Supplied)
To Service
From
Well
Figure
When installed on a driven point well, your Shallow Well
Water System should have a check valve installed as shown
in Figure 2A.
L
Check Valve
Steel Drive Pipe
Figure 2A
Drive coupling
Well point
у Driven point
For a pump at sea level mounted directly over the well, be
sure the total lift from the pumping water level to the pump
does not exceed 20 feet. This will be less if the pump is off­
set from the well.
The maximum lift of any pump decreases at the rate of about
1’ less lift for every 1,000 feet of elevation above sea level.
For example, at Denver, Colorado (Elev. 5,000’) the pump
loses five feet of lift. The maximum depth from which it
would pump water would therefore be 15 feet.
Plastic Pipe
Well Seal
Coupling
Plastic Pipe
Foot Valve
and Strainer
Dug or Cased Well
Figure 2B
PUMP/TANK INSTALLATION
Pump
NOTICE: Use Teflon tape supplied with the pump or Plasto-
Joint Stik’ for making all pipe-thread connections to the
pump itself. To avoid stress-cracking, do not use pipe joint
compounds on the pump.
1. Wrap male pipe threads being attached to pump with
one or two layers of Teflon tape. Cover entire threaded
portion of pipe.
2. Do not overtighten threaded fittings in the plastic pump.
Be sure you do not try to lighten joint past thread stop
in pump port!
3- Ifleaks occur, remove fittings, clean off old tape, rewrap
with two to three layers of tape and remake the con­
nection. If joint still leaks, replace the fittings (fittings
may be undersized).
4. Be sure to support aH piping connected to the System.
'Lake Chemical Co., Chicago, Illinois
Horizontal Piping from Well to Pump
When the pump is offset more than 25 feet from the well,
horizontal suction pipe size should be Increased to reduce
friction losses. Never install a suction pipe that is smaller
than the suction tapping of the pump.