Installation 4
For parts or assistance, call Simer Customer Service at 1-800-468-7867
Major Components
And What They Do
Impeller and Jet
Impeller turns with motor shaft, causing water to fly out
from its rim by centrifugal force. Impeller rotation creates
a vacuum which pulls in more water. Part of the water
is diverted back to the jet where it passes through the
nozzle and venturi. This creates more vacuum to draw in
more water.
In shallow wells (less than 25 feet deep), the vacuum
created at the pump is enough to pull water to the
pump. Therefore, for shallow well use the jet is built into
thepump.
Pre-Charged Tank
The tank serves two functions. It provides a reservoir
of water under pressure and maintains a cushion of
air pressure to prevent pipe hammering and possible
damage to plumbing components. When water is drawn
off through the house fixtures, the pressure in the tank is
lowered and the pump starts.
Pressure Switch
The pressure switch provides for automatic operation.
Pump starts when pressure drops to 30 pounds and stops
when pressure reaches 50 pounds.
Check Valve or Foot Valve
Install a check valve as close to well as possible on well
point installations. A foot valve must be installed in the
well on dug or cased wells. See Figures 1 and 2. For long
horizontal pipe runs, install check valve as close to well
as possible (all types of wells).
Horizontal Piping
from Well toPump
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.
1-1/4” 1-1/2” 2”
Up to 25 Ft. 25 to 50 Ft. 50 to 200 Ft.
Discharge Pipe Sizes
When the pump is some distance from the house or
point of water use, the discharge pipe size should be
increased to reduce pressure losses caused by friction.
1” 1-1/4” 1-1/2”
Up to 25 Ft. 25 to 100 Ft. 100 to 600 Ft.
Tank
Tank is pre-charged with 40 pounds per square inch
(PSI) air pressure at the factory. Your tank requires an
air charge of 28 PSI for proper operation; check tank
pressure with tire gauge and adjust air charge as needed.
Tank pre-charge should be checked annually; see
Discharge Pipe and TankConnections.
In areas where the temperature is high for long periods
of time, the tank pre-charge pressure may increase.
This may reduce the tank drawdown (amount of water
available per cycle). If this occurs, reduce the pre-charge
pressure until it is 2 PSI below the pump cut-in setting of
the pressure switch (normally 30 PSI).
It is necessary to flush all air out of the piping system and
water reservoir portion of the pre-charged tank. This is
required on new installations, pumps requiring repriming
and pumps that have been disassembled for service. Do
this as follows:
1. Open faucets furthest from tank and allow pump
tooperate.
2. Air in the system will cause a sputtering flow; allow
faucets to run until you have a steady, air free stream.
3. Open and close faucets repeatedly until you are sure
all air has been removed.
4. If stream does not become steady, air may be leaking
into the system; check for leaks in the piping on the
suction side of the pump.
NOTICE: To prevent waterlogging, check tank
air chargeannually. See Discharge Pipe and
TankConnections.
Replacing An Old Pump
Hazardous voltage. Disconnect power to
pump before working on pump or motor.
1. Drain and remove the old pump. Check the old pipe
for scale, lime, rust, etc., and replace it if necessary.
2. Install the pump in the system. Make sure that all
pipe joints in the suction pipe are air-tight as well
as water tight. If the suction pipe can suck air, the
pump will not be able to pull water from the well.
3. Adjust the pump mounting height so that the
plumbing connections do not put a strain on the
pump body. Support the pipe so that the pump body
does not take the weight of piping or fittings.
You have just completed the well plumbing for your new
shallow well jet pump. Please go to Discharge Pipe and
Tank Connections.
