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PUMP TO TANK INSTALLATION
Red Lion® recommends using pre-charged diaphragm tanks. Instructions
for connecting the pump to a diaphragm tank have been provided for
your convenience.
If a non-diaphragm tank is used in the pressure system, an air volume
control must be used to maintain an air cushion in the pressure tank.
If not, air in the tank will gradually be absorbed by water, causing the
tank to waterlog and the pump to short cycle (turn off and on frequently).
This greatly shortens the life of the motor. An air volume control will
provide the right air/water ratio and prevent waterlogging. Refer to the
pressure tank owner's manual for instructions.
A check valve should never be installed between the pump
NOTE:
and the tank.
Before proceeding, ensure power has been shut off at the breaker. If this
is replacing an existing pump, completely relieve pressure from the water
system before working on the water system. Open the faucet nearest the
tank and allow the water to drain until the tank is empty.
s
WARNING
!
75 PSI PRESSURE RELIEF VALVE RECOMMENDED
This pump is capable of producing high pressure. Installing a 75 psi
pressure relief valve is highly recommended.
1. The discharge pipe from the pump to the tank should be as short and
direct as possible and should be the same size as the discharge outlet.
You should have already attached a 1" PVC adapter to the discharge
opening of the pump.
2. Attach a PVC 90° elbow to the adapter.
3. Attach a male PVC adapter to the tank. The tank fitting size depends on
the system connect on the tank.
4. Install a 1" brass tank tee to the tank adapter.
5. Measure the distance from the tank tee to the elbow (or restrictor valve)
on the pump's discharge and attach 1" PVC piping to fit.
6. Attach accessories to the brass tee, such as restrictor valve
(recommended for well point installations), high pressure safety relief
valve (recommended for all installations), and drain cock. Ensure the
high pressure safety relief valve's location is near the discharge of the
pump and in an area with adequate drainage. Be sure to direct the valve
so that any water flow will not spray toward the pump or any other
electrical devices.
7. Add piping and coupling to join up the service line. The size of the
service line required is governed entirely by the amount of water
needed and the length of the pipe. The pipe selected should be large
enough so that the friction loss (determined from Table 1, Friction Loss
for Plastic Pipe) will never exceed 20 ft (6 m) of head.
8. Remove the PVC cap on the air valve on the tank.
9. Check the tank pre-charge with a tire gauge. It should be equal to
2 psi below the pressure switch cut-in setting (the pressure at which
the pump will start). For this pump it is 30 psi; therefore, the pre-charge
pressure should be adjusted to 28 psi. Use a tire pump or air compressor
to charge the tank, if necessary.
10. Replace and tighten the PVC cap on the air valve.
11. See Typical Installations for examples of different pump/tank
configurations.
12. Verify everything has been completed using the Installation Checklist
provided in this manual.
Table 1 - FRICTION LOSS FOR PLASTIC PIPE*
Loss of head in feet, due to friction per 100 feet of pipe.
Nominal
Pipe Size
U.S. GPM
3/4"
4
3.75
5
5.66
6
7.95
7
10.60
8
13.50
9
16.80
10
20.40
11
24.40
12
28.60
14
38.00
16
48.60
18
60.50
20
73.50
Loss of head in meters, due to friction per 100 meters of pipe.
Nominal
Pipe Size
L/Min.
20 mm
15
3.7
20
5.3
25
7.1
30
13.5
35
16.3
40
23.5
45
28.3
50
34.2
55
40.7
60
48.1
65
55.7
70
63.8
75
72.2
10
1"
1-1/4''
1-1/2''
1.15
0.30
0.14
1.75
0.46
0.22
2.45
0.65
0.31
3.25
0.86
0.41
4.16
1.10
0.52
5.17
1.35
0.65
6.31
1.67
0.79
7.58
1.98
0.95
8.85
2.33
1.10
11.80
3.10
1.46
15.10
3.96
1.87
18.70
4.93
2.33
22.80
6.00
2.83
25 mm
32 mm
40 mm
1.15
0.30
0.13
1.64
0.43
0.19
2.18
0.56
0.27
4.13
1.08
0.49
5.00
1.31
0.61
7.30
1.90
0.88
8.74
2.31
1.07
10.60
2.79
1.32
12.60
3.32
1.56
14.90
3.92
1.85
17.30
4.45
2.15
19.70
5.20
2.46
22.40
5.89
2.78
*For galvanized pipe, double the figures.
2''
–
–
–
–
–
–
0.23
0.27
0.32
0.43
0.55
0.69
0.84
50 mm
–
–
–
–
–
0.25
0.29
0.38
0.46
0.54
0.63
0.73
0.83
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