Water Duro Pumps DCJ500 Product guide

Convertible Jet Pumps
Models DCJ500 (#6330) & DCJ750 (#6331)
Operating & Installation Instructions
Please read these instructions carefully. Failure to comply with instructions and designed operation of this system may void
the warranty.
Your pump has been carefully packaged at the factory to prevent damage during shipping. However, occasional damage
may occur due to rough handling. Carefully inspect your pump for damage that could cause failure. Report any damage to
your carrier or your point of purchase.
This pump is designed for shallow well installation for water level up to 25 feet, with injector installed on pump body; or for
deep well installation for water level up to 80 feet, with 1-1/4” pipes and injector down in the well. A pressure switch and
pressure gauge are standard features. The pump starts when the pressure drops to a cut-in setting (30 psi) and cut-out
setting (50 psi). The DuroJet Convertible Jet Pump can be mounted to either a pre-charged horizontal pressure tank or used
with a pre-charged free standing pressure tank. The pumps can also be used with conventional air to water tanks. For deep
well applications, replace the short tube in the ejector assembly to long tube #302922 (sold separately).
NOTE: Pre-assembled pump and pre-charged pressure tank packages are also available.
#54806EF Rev. 4/11
Dual Jet
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1
General Safety Information
1. Know the pump application, limitations and potential hazards.
- Always install a pressure relief valve to match the system pressure rating and the maximum flow rate.
- Disconnect power and relieve all pressure from the system before attempting to install, service, relocate or perform
any maintenance. Lock the power disconnect in the open position. Tag the power disconnect to prevent unexpected
application of power. Install a screen around the inlet pipe to prevent entrapment of swimmers (if applicable).
2. Drain all liquids from the system before servicing.
3. Secure the discharge line before starting the pump. An unsecured discharge line will whip and possibly cause personal
injury and/or property damage.
4. Check hoses for weak or worn conditions before each use. Make certain all connections are secure.
5. Periodically inspect pump and system components. Perform maintenance as required.
6. Personal Safety:
a. Wear safety glasses at all times when working with pumps.
b. Keep work area clean, uncluttered and properly lighted – replace all unused tools and equipment.
c. Keep visitors at a safe distance from work area.
7. When installing pump, cover the well to prevent foreign matter from falling into well and contaminating the water and
damaging internal mechanical pumping components.
8. Always test the water from the well for purity before use. Check with local health department for test procedure.
9. Complete pump and piping system MUST be protected against freezing temperatures. Freezing temperatures could
cause severe damage and void the warranty.
10. Do not run the pump dry or damage will occur.
11. The unit should be connected to a grounded circuit equipped with a ground fault interrupter device.
12. Before installing the pump, have the electrical outlet checked by a licensed or certified electrician to make sure the outlet
is properly grounded.
13. Make sure the line voltage and frequency of electrical current supply agrees with the motor wiring.
14. Do not attempt repairs to the electric motor. All repairs to the motor must be completed at a licensed or certified electrical
motor repair shop.
  
15. Avoid kinking the electrical cord and protect from sharp objects, hot surfaces, oil and chemicals. Replace or repair
damaged or worn cords immediately.
16. Keep fingers and foreign objects away from ventilation and other openings. Do not insert any objects into the motor.
  
17. Use wire of adequate size to minimize voltage drop at the motor.
  

  



18. This pump has been evaluated for use with water only.



Pre-installation

The function of the tank is to store a quantity of water under pressure. When full, the tank contains approximately 2/3 water
and 1/3 compressed air. The compressed air forces the water out of the tank when a faucet is opened. An air volume
control automatically replaces air lost or absorbed into the water. The usable water, or drawdown capacity, of the tank is
approximately 1/6 of the tanks total volume.
If you have a conventional tank using an air volume control, the tube to the air volume control must be connected to
the pump suction pipe.

A pre-charged storage tank has a flexible bladder or diaphragm that acts as a barrier between the compressed air and the
water. This barrier prevents the air from being absorbed into the water and allows the water to be acted on by compressed
air at initially higher than atmospheric pressures (pre-charged). More usable water is provided than with a conventional type
tank. Pre-charged tanks are specified in terms of a conventional tank. For example, a 20 gallon prec-harged tank will provide
the same usable water or drawdown capacity as a 40 gallon conventional tank, but the tank is smaller in size.

The pressure switch provides for automatic operation. The pump starts when pressure drops to a cut-in setting. The pump
stops when pressure reaches a cut-out setting. The factory set pressure switch setting is 30 psi (cut-in) and 50 psi (cut-out).

A new well should be pumped clear of sand before installing the pump. Sand will damage the pumping parts and seal. The
drawdown level of the well should not exceed the maximum rated depth for the pump. The capacity of the pump will be
reduced and a loss of prime may occur.

Select a location as close to the water supply as possible. Be sure to comply with any provincial/state or local codes
regarding the placement of the pump. The equipment must be protected from the elements. A basement, frost-proof pit or
heated pump house are good locations. Make sure the pump has proper ventilation.

Piping may be copper, rigid PVC plastic or flexible polyethylene plastic.
The pipe must be clean and free of rust or scale. Use a pipe joint compound on the male threads of the metal pipe. Teflon
tape should be used with plastic threads. All connections must be air tight to insure normal operation.
Slope all inlet piping upwards towards the pump to prevent trapping air. Unions or hose couplings can be installed near the
pump to facilitate removal for servicing or storage.

Long horizontal pipe runs and an abundance of fittings and couplers decrease water pressure due to friction loss.
Friction losses in the suction pipe must be taken into consideration when the horizontal offset is greater than 50 feet. The
suction pipes should be increased from 1” to 1-1/4” and from 1-1/4” to 1-1/2”. This will reduce friction losses and allow the
pump to give maximum performance.
. Damage to the seal may occur. fill pump body and suction pipe with before turning on the power.
2

Some installations may require adaptation to meet individual
circumstances.
Check Valve
Slope Piping to Well
Standing Water Level
Well
Seal
Drawdown in
Feet
Pumping Water Level
Foot Valve
Vertical Lift
in Feet
3
Typical DuroJet Convertible Shallow Well Jet Pump Installation
DuroJet Convertible Shallow Well Jet Pump Application
The DuroJet Convertible Shallow Well Jet Pumps have only one pipe between the pump and the water supply. This pump is
designed for pumping potable water in applications where water is located less than 25 feet vertically from the pump.

1. Install a foot valve on the first section of pipe.
2. Lower the pipe into the well.
3. Add pipe until the foot valve is 5 feet below the lowest anticipated water level.


4. After the proper depth is reached, install a well seal or pitless adapter to support the pipe and prevent surface water and
other contaminants from entering the well.
5. Slope the horizontal pipe upward toward the pump to eliminate trapping air. Sloping the pipe will also aid in priming the
pump.
6. Fasten the pump down securely in its permanent location to minimize pump vibration when operating.

1. Drive the point several feet below the water table.
 A packer-type foot valve can be installed in the well. This type of foot valve allows the well to be filled with water
when priming and makes the inlet pipe much easier to test for leaks. Follow the manufacturer’s instructions when
installing the packer-type foot valve. As an alternative, an in-line check valve can be used with a driven well. The pipe
between the check valve and the water level will always be under vacuum. Leaking joints or couplings will allow air
to leak into the pipe and cause abnormal pump operation. Make sure to use pipe joint compound on all male pipe
threads.

1. Install a foot valve on the inlet pipe and lower into the water.
CAUTION! The foot valve should be at least 18” from the bottom or sand or sediment could be drawn into the system.
 When a lake is used as a water supply, make sure the inlet pipe is deep enough to be submerged at all times. Slope
the horizontal piping upward toward the pump to prevent trapping air. The pipe must be removed during winter
months or protected against freezing.

 
Pump for shallow well
Pump for deep well
Pump
Ejector
1-1/4" Elbow
Male 1-1/4" Adapter
Well Seal , Single Pipe
Rigid 1-1/4" Pipe
& Couplers
Foot Valve 1-1/4"
Male 1-1/4" Adapter
Pump
Ejector
Foot Valve 1-1/4"
Male 1-1/4" Adapter
Well Seal , 2 Pipe
1-1/4" Elbow
Male 1-1/4" Adapter
1" Elbow
Pipe Nipple , 1"*6"
1" Female Pipe Adapter
Male 1-1/4" Adapte
r
Pipe Nipple , 1"*6"
1" Female Pipe Adapter
AB

Slope Piping to Well
Foot Valve
Draw
Down in
Feet
Pumping
Water
Level
Vertical Well
Lift 25 to 100
Feet
Standing
Water Level
Typical DuroJet Convertible Deep Well Jet Pump Installation

1. Install air volume control on tank.
2. Connect the tube from the air volume control to the tee in the suction. Be sure the connections are tight. Leaking can
cause the pump not to prime.
3. Install a valve and an isolator hose between the tank and the hose plumbing to aid in pump removal for servicing and for
reducing the noise transmitted to the house through the piping.
4. Provide a hose bib (faucet) at the lowest point in the system to drain the system for service or storage.

1. Shut off the power to the pump.
2. Open the faucet nearest the tank and allow all water to drain from the tank.
3. Measure the tank precharge at the valve stem using a tire pressure gauge.
4. If necessary, precharge with an air pump to 2 PSI below the cut in pressure of the pump.
5. Slope the horizontal pipes upward toward the pump to prevent trapping air. If the horizontal distance exceeds 25 ft.
DuroJet Convertible Deep Well Jet Pump Installation Instructions
The DuroJet Convertible Deep Well Jet Pumps have two pipes and the injector is down in the well. This pump is designed for
pumping potable water in applications where the water level is up to 80 feet.

1. Assemble the foot valve to the ejector. The short tube in the ejector assembly needs to be replaced with long tube (#302922).
2. Connect suction pipe and drive line to the ejector as shown in the diagram on the following page.
3. Install the assembly so foot valve is submerged at least 10 feet below pumping level. Mechanical seal could be damaged
by running the pump dry.


4. After the proper depth is reached, install a well seal or pitless adapter to support the pipe and prevent surface water and
other contaminants from entering the well.
5. Horizontal Piping - Connect horizontal piping to the well assembly. Gradually slope pipe up to the pump location,
eliminating all dips and high spots and using as few elbow connections as possible. All pipe connections should be
absolutely air tight for best pump performance.
6. Fasten the pump down securely in its permanent location to minimize pump vibration when operating.
4
Pump for shallow well
Pump for deep well
Pump
Ejector
1-1/4" Elbow
Male 1-1/4" Adapter
Well Seal , Single Pipe
Rigid 1-1/4" Pipe
& Couplers
Foot Valve 1-1/4"
Male 1-1/4" Adapter
Pump
Ejector
Foot Valve 1-1/4"
Male 1-1/4" Adapter
Well Seal , 2 Pipe
1-1/4" Elbow
Male 1-1/4" Adapter
1" Elbow
Pipe Nipple , 1"*6"
1" Female Pipe Adapter
Male 1-1/4" Adapter
Pipe Nipple , 1"*6"
1" Female Pipe Adapter
AB

5
Electrical


a. When the means of connection to the supply-connection box is other than grounded metal conduit, ground the pump
back to the service by connecting a copper conductor, at least the size of the circuit conductors supplying the pump, to
the grounding screw provided within the wiring compartment.
b. This pump is provided with a means for grounding. To reduce the risk of electric shock from contact with adjacent
metal parts, bond supply box to the pump-motor-grounding means and to all metal parts accessible at the well head.
1. Check local electrical and building codes before
installation.
2. The Jet Pump Motors are pre-configured at the factory for 115VAC, 60 Hz operation. If 230V operation is required, the
Jet Pump Motor can be easily switched from 115 to 230 VAC, 60 Hz. Refer to the Motor Label at the motor. If the motor
is converted from a 230 VAC to 115 VAC, an electrician should insure the electrical branch circuit can handle the higher
currents. The Voltage Selector should be reviewed to insure the voltage selected at the motor matches the voltage
supplied.
Check the pump label for the proper voltage required. Do not connect to voltage other than that shown on the label.
Cross check the power supply voltage with a voltmeter and the motor selector knob.
3. A separate branch circuit is required. The pump should be connected to a separate electrical circuit directly for the main
electrical service panel. Do not use an extension cord.
4. It is mandatory that a permanent ground connection be made from the pump motor to the grounding bar at the service
panel. Do not connect the pump motor to a power supply until the pump is permanently grounded.
The ground wire should be copper and at least as large as the power supply wire size. The power supply wire should be
copper.
5. Recheck the voltage after the pump motor has started. There should be some voltage drop, but voltage drop should be
no more than 5% of the nominal voltage.
Failure to ground this unit properly may result in severe electrical shock.






NEC allows a 5% voltage drop between the Service
Panel and the Pump. The table below reflects the
Maximum Wire length to comply with NEC.

Remove the plate from the motor compartment and wire the motor as shown below.

   

   
DCJ 500
(1/2 HP)
115 11.6 103 163 260 413
230 5.8 411 653 1,038 1,651
DCJ 750
(3/4 HP)
115 12.8 93 148 235 379
230 6.5 367 582 926 1,473
LINE 1
BLUE
WHITE
LINE 2
115V 60Hz
BLUE
WHITE
LINE 1
LINE 2
230V 60Hz

6
Operation
Priming the DuroJet Convertible Shallow Well Jet Pumps

1. Remove prime plug.
2. Fill pump and piping completely full of cold water.
3. Replace the prime plug.
4. Open a faucet to vent the system.
5. Start the motor. Water will be pumped within a few minutes. If the pump fails to prime within 5 minutes, stop the motor
and refill the pump with cold water. The priming time is proportional to the amount of air in the inlet pipe. Refill as often
as necessary.
6. Let the system operate for several minutes to flush all pipes.
7. Close the faucet and allow the pump to build pressure in the tank. When the pressure reaches the cut-out setting, the
motor will stop.
The system is now in operation and will automatically cycle on demand.





Drain openings are provided on all models. To drain the pump:
1. Remove the drain fitting and the prime plug to vent the system.
2. Drain all piping to a point below the freeze line.
Priming and Setting the DuroJet Convertible Deep Well Jet Pumps
When using DuroJet pumps on deep well applications, longer tube for ejector assembly is required. WaterGroup’s part
number for the long tube is (#302922).
1. Remove prime plug from the pump discharge.
2. Fill pump and piping completely full of cold water.
3. Replace the prime plug
4. Make sure that the long tube is replaced with short tube in the ejector assembly.
5. Start the pump. When the pump is properly primed, a high pressure will show immediately on the gauge.
6. If no pressure is shown, stop the pump and repeat Steps 1 - 3. Several attempts may be required before the pump is
primed.
7. The pressure obtained in Step 6 will be the minimum operating pressure of the pump.
8. When the correct pressure is set, close the faucets. Pressure will rise to close the pressure switch and the pump will stop
automatically.
9. With the pump primed and set, check operation by opening and closing faucets as necessary, allowing the pump to cycle
automatically.
 Systems with long offset lines or driven well points may take several attempts to prime. If your pump does not prime
within one or two minutes, repeat Steps 1 to 3. When the pump is primed and running, check operation by opening and
closing faucets as necessary, allowing the pump to cycle automatically.





7

Drain openings are provided on all models. To drain the pump:
1. Remove the drain fitting and the prime plug to vent the system.
2. Drain all piping to a point below the freeze line.

Conventional tanks can be drained by opening an outlet at the lowest point in the system. Remove a plug or the air volume
control to vent the tank.
Precharged tanks force virtually all the water from the tank when the system pressure is released. No draining is necessary.

If the pump has been serviced, drained, or has not been used for some time, be sure there is water in the pump housing
(volute) and the piping to the well. There must be water in the pump housing (volute) at all times when the pump is running to
avoid internal damage of seal members (see page seven for priming information).

Some air is lost through the bladder in any tank. To prevent tank failure, check the tank precharge on a yearly basis.
1. Open a faucet nearest the tank and allow all water to drain from the tank.
2. Measure the tank precharge at the valve stem using a tire gauge.
3. If necessary, adjust the precharge with an air pump to 2 PSI below the cut-in pressure of the pump.

The bearings used in the pumps are lifetime lubricated at the factory and require no additional lubrication.

When a tank system has an inadequate ratio of air and water, the pump will start and stop often and erratically.
1. Disconnect the power to the pump.
2. Open the lowest faucet in the system to release all pressurized water in the system.
3. Prime the pump.
4. Reconnect the power to the pump.
As the pump refills the tank with water, the air volume control supplies the tank with the correct air to water ratio
for the system to operate. If the air volume control is good, the pump will shut off at the desired cut-off and will be
adjusted correctly.

If a precharged tank becomes waterlogged, the bladder is normally leaking or broken.
1. Test the tank by depressing the air valve. The air valve will expel water if the bladder is broken.
2. Replace the tank.

8
Parts Breakdown - For Deep Well Application
DCJ500 (#6330) & DCJ750 (#6331)
138
17 542
12
7
25 24
20
11
19
10
15
6
13
14
16
9
23
22
21
   
1302900 MOTOR, 1/2 HP, DCJ500 1
302901 MOTOR, 3/4 HP, DCJ750
2 302902 SCREW, DIFFUSER, 1/4-20 * 7/8" 3
3 302903 SCREW, HOUSING, 3/8-16 * 1-1/2" 4
4 302904 DIFFUSER, DCJ500, DCJ750 1
5302905 IMPELLER, 1/2 HP, DCJ500 1
302906 IMPELLER, 3/4 HP, DCJ750
6 302907 PRESSURE TUBE, 0.38 Meter 1
7 302908 HOUSING, DCJ500, DCJ750 1
8 302909 SEAL PLATE, DCJ500, DCJ750 1
9 302910 BRACKET, DCJ500, DCJ750 1
10 302911 PLUG, DRAIN, PRIME, DCJ500/750, 1/4" -18NPT 2
11 302912 O-RING, DIFFUSER, DCJ500/750, OD 34.5*3.5 1
12 302913 O-RING, HOUSING, DCJ500/750,OD 154.5*3.5 1
13 302914 ADAPTER, PRESSURE SWITCH, DCJ500/750 1
14 302915 NUT, ADAPTER, PRESSURE SWITCH, DCJ500/750 1
15 302916 ADAPTER, PRESSURE TUBE,DCJ500/750,1/4 -18NPT 1
16 302917 PRESSURE SWITCH,DCJ500/750 1
17 302918 MECHANICAL SEAL,DCJ500/750 1
19 302920 WASHER, EJECTOR,DCJ500/750,3/8" 2
20 302921 SCREW,EJECTOR,DCJ500/750, 3/8-16*1-1/4" 2
21 302922 LONG TUBE, DCJ500/750,FOR DEEP WELL 1
22 302923 SHORT TUBE,DCJ500,1/2HP,SHALLOW WELL 1
302924 SHORT TUBE,DCJ750,3/4HP,SHALLOW WELL
23 302925 NOZZLE,DCJ500 1
302926 NOZZLE,DCJ750
24 302927 EJECTOR,DCJ500/750 1
25 302928 WASHER,EJECTOR,DCJ500/750 1

9
Lift
(FT)
Discharge Pressure in PSI Shut Off
PSI
30 40 50 60 70 80
Capacity in USGPM
2 15.1 12.2 7.7 3.7 67.0
4 14.8 11.7 7.2 3.5 66.0
5 14.6 11.5 6.9 3.0 66.0
6 14.2 11.2 6.6 2.8 66.0
8 13.8 10.9 6.4 2.6 66.0
10 13.6 10.7 6.2 2.4 66.0
12 13.1 10.5 6.0 2.3 65.0
14 12.8 10.2 5.7 2.1 65.0
15 12.6 10.1 5.5 2.0 65.0
16 12.3 9.9 5.2 1.7 65.0
18 12.1 9.5 5.0 1.5 63.0
20 11.8 9.4 4.7 1.4 63.0
22 10.6 8.3 4.5 1.2 62.0
24 9.4 7.3 4.3 1.1 62.0
25 8.3 6.7 4.2 1.1 61.0
26 8.1 6.5 4.0 0.8 61.0
28 7.8 6.1 3.7 0.6 60.0
30 7.6 5.9 3.3 0.2 60.0
Shallow Well Performance

Lift
(FT)
Discharge Pressure in PSI Shut Off
PSI
30 40 50 60 70 80
Capacity in USGPM
2 20.7 14.9 8.1 1.4 62.0
4 20.2 14.4 7.8 1.2 61.0
5 19.5 13.5 7.2 1.0 61.0
6 18.7 13.2 7.1 0.8 61.0
8 18.5 13.1 6.8 0.7 60.0
10 18.1 12.7 6.6 0.6 60.0
12 17.9 12.4 6.4 0.5 60.0
14 17.8 12.2 6.1 0.5 60.0
15 17.3 11.8 5.9 0.5 60.0
16 16.5 11.4 5.7 0.4 60.0
18 15.2 11.1 5.5 0.1 60.0
20 14.7 10.5 5.1 57.0
22 13.4 9.8 4.9 55.0
24 12.9 9.3 4.5 53.0
25 11.5 8.1 4.4 53.0
26 11.1 7.9 4.1
28 10.9 7.6 3.8
30 10.7 6.9 3.7

Lift in Feet
30 40 50 60 70 80
Capacity in USGPM at 20 psi
666543
Capacity in USGPM at 30 psi
665432
Capacity in USGPM at 40 psi
54321
Capacity in USGPM at 50 psi
32211
Capacity in USGPM at 60 psi
2111
Deep Well Performance

Lift in Feet
30 40 50 60 70 80
Capacity in USGPM at 20 psi
666554
Capacity in USGPM at 30 psi
666543
Capacity in USGPM at 40 psi
544321
Capacity in USGPM at 50 psi
44321
Capacity in USGPM at 60 psi
33221

Performance Curves
 
0
20
40
60
80
100
120
140
160
0 2 4 6 8 10 12 14 16 18 20
Flow Rate (USGPM)
Head (FT)
Head (FT) DCJ500
Head (FT) DCJ750
0
20
40
60
80
100
120
140
160
180
0 5 10 15 20 25
Flow Rate (USGPM)
Head (FT)
Head (FT) DCJ500
Head (FT) DCJ750