Sears CRAFTSMAN 390.291198 User manual

OWNER’S
MANUAL
Model No.
390.291198
390.291358
390.291558
390.291658
390.291698
390.291758
CAUTION:
Read and Follow
All Safety Rules and
Operating Instructions
Before First Use of
This Product.
Save This Manual For
Future Reference.
Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.
PRINTED IN U.S.A.
Form No. F642-9821 (Rev. 7/29/04)
• Safety Instructions
• Installation
• Operation
• Service Hints
• Repair Parts
CAPTIVE AIR®TANK
®

2
FULL FIVE YEAR WARRANTY on CRAFTSMAN®CAPTIVE AIR®TANK
For five years from the date of purchase, Sears will replace the tank free of charge, if defective in materials or workmanship. This
warranty does not cover repairs or replacement parts necessary because of abuse or negligence, including failure to install, adjust
and operate this tank according to the instructions in the owner’s manual.
LIMITATION OF LIABILITY
SEARS WILL NOT BE LIABLE FOR LOSS OR DAMAGE TO PROPERTY OR ANY INCIDENTAL OR CONSEQUENTIAL LOSS OR EX-
PENSE FROM PROPERTY DAMAGE DUE DIRECTLY OR INDIRECTLY FROM THE USE OF THIS PRODUCT.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion
may not apply to you.
WARRANTY SERVICE IS AVAILABLE BY SIMPLY CONTACTING THE NEAREST SEARS SERVICE CENTER/DEPARTMENT IN THE
UNITED STATES. FOR SERVICE OUTSIDE THE U.S.A., CONTACT YOUR LOCAL SEARS SERVICE CENTER OR STORE.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
Sears, Roebuck and Co., Dept. 817 WA, Hoffman Estates, IL 60179
1. Read these Rules and the Instructions carefully. Failure
to follow them could cause serious bodily injury and/or
property damage.
These water storage tanks are designed for
operation on cold well water systems lim-
ited to a maximum working pressure of 100
pounds per square inch (PSI). If your water system can ex-
ceed 100 P.S.I., install a Sears No. 2729 relief valve on the
system. Failure to follow these instructions can cause tank
blow-up and result in serious injury.
NOTICE: Although No. 2729 Relief Valve is set to open at
75 PSI, for your safety Captive Air®Tanks are designed and
rated to operate at up to 100 PSI.
2. Be sure installation meets all local plumbing, pump,
electrical and well codes.
3. Always test water from well for purity before using. Call
your local health department for testing procedure.
4. Before installing or servicing your pump, BE SURE
pump power source is disconnected.
RULES FOR SAFE INSTALLATION AND OPERATION
This is the safety alert symbol. When you see this sym-
bol on your tank or in this manual, look for one of the fol-
lowing signal words and be alert to the potential for
personal injury:
DANGER warns about hazards that will cause serious per-
sonal injury, death or major property damage if ignored.
WARNING warns about hazards that will or can cause
serious personal injury, death or major property damage if
ignored.
CAUTION warns about hazards that will or can cause
minor personal injury or property damage if ignored.
The label NOTICE indicates special instructions which are
important but not related to hazards.
Carefully read and follow all safety instructions in
this manual and on tank.
Keep safety labels in good condition.
Replace missing or damaged safety labels.
READ AND FOLLOW SAFETY INSTRUCTIONS!

3
If your system can develop more than 100
PSI pressure, install a Sears No. 2729 relief
valve in system to prevent possibility of
tank blow-up.
NOTICE: DO NOT use any type of lubricant other than
water on Hose to Plastic fittings.
If rigid piping is installed to elbow on inlet flange, BE SURE
to support the piping.
For proper installation of your pump to tank, follow one
of the typical installations on Page 4 and 5. Use Teflon tape
on all threaded connections to tank.
Standard pipe fittings, such as nipples, tees and elbows
must be purchased locally. If you are using a horizontal jet
pump mounted on top of tank, Figures 5 and 6, Kit No.
2788 is required. See Page 10 for contents of kit.
If your present system has an air volume control (AVC), re-
move it and plug AVC port on pump.
Complete pump, tank, and piping system MUST be pro-
tected against below freezing temperature. Failure to do
so could cause severe damage and voids the warranty.
* Lake Chemical Co., Chicago, Illinois.
INSTALLATION
BASIC TOOLS AND MATERIALS NEEDED
PLASTIC PIPE INSTALLATIONS
TOOLS MATERIALS
Pipe Wrenches Plastic Pipe and Fittings (as required to complete job).
Screwdriver Teflon Tape (DO NOT use pipe joint compound on
Knife or Saw to Cut Plastic Pipe plastic fittings) or Plasto-Joint Stik*
Tire Pressure Gauge
GALVANIZED STEEL PIPE INSTALLATIONS
TOOLS MATERIALS
Pipe Wrenches Galvanized Pipe and Fittings (as required to complete job).
Screwdrivers Pipe Joint Compound or Teflon tape
Pipe Cutting and Threading Tools
Tire Pressure Gauge
CONTENTS
WARRANTY.....................................................................2
SAFETY ............................................................................2
INSTALLATION .............................................................3-6
OPERATION ....................................................................7
SERVICE HINTS ............................................................7-9
REPAIR PARTS...........................................................10-11
INTRODUCTION
Please read our instructions before you install and use your
tank. This will help you obtain full benefits from this tank.
It will also help you avoid needless service expense that
result from causes we cannot control and cannot cover in
our Warranty.

2893 0697
Priming Plug,
Priming Tee
(User Supplied)
To Service
From
Well
2893 0697
Priming Plug,
Priming Tee
(User Supplied)
To Service
From
Well
2897 0697
Priming Plug,
Priming Tee
(User Supplied)
To Service
From
Well
4
To Service
From
Well
1" x 3/4" Reducer
Bushing (User
Supplied)
2892 0697
To Service
From
Well
1" x 3/4" Reducer
Bushing (User
Supplied)
FIGURE 6 – Vertical Tank With Deep Well Jet
Pump
FIGURE 5 – Vertical Tank With Shallow Well Jet
Pump
FIGURE 3 – 2 Gallon Tank Mounted Above
Shallow Well Jet Pump
FIGURE 4 – 2 Gallon Tank Mounted Above
Deep Well Jet Pump
2894 0697
Priming Plug,
Priming Tee
(User Supplied)
To Service
From
Well
2898 0697
Priming Plug,
Priming Tee
(User Supplied)
To Service
From
Well
FIGURE 2 – Typical Installation: Deep Well Jet On
Horizontal Tank. To Mount Pump To Tank,
Purchase Tank Fittings Kit 2788.
FIGURE 1 – Typical Installation: Shallow Well Jet
On Horizontal Tank. To Mount Pump To Tank,
Purchase Tank Fittings Kit 2788.

5
FIGURE 7 – Tanks With High Capacity Or Residential Size Submersible Pumps
INSTALLATION
20 100
80
60
40
Relief Valve
Pressure
Regulator
1" Discharge
Pre-Charged
Pressure Tank
2358b 0697
FIGURE 6 – 19, 36, 50 and 85 Gallon Tanks With Multi-Stage Pumps
NOTICE: 50 and 85 gallon tanks are
not equipped with mounting bracket.
Install pump beside tank as shown.
NOTICE: When using plastic fitting or
installing a plastic pump, use only
Teflon tape or Plasto-Joint Stik on male
threads.
1* – 1” x 1” Tee
2* – 1” Nipple
3* – 1-1/4” X 1” Reducer Bushing
Required for 50 and 85
gallon tanks.
*Not furnished – must be
purchased locally
Pump To Tank Fittings Package –
Not Furnished With Tank,
Purchase Kit Stock No. 2788
From Your Sears Store.
To Household
Water System
Not
to
Scale
2391 0496A Relief Valve,
Sears Stock
No. 2729
Pressure Gauge,
Sears Stock
No. 2768
Control Center
(3-Wire Pump
Only)
Electrical
Disconnect
Switch (All
Installations)
Cable for Two-Wire
Pumps runs directly
from Pressure
Switch to Motor
From Well
To Pump
Motor
ON
ON
OFF
OFF
Submersible Pump
Manifold, Sears
Stock No. 2722
Pressure Switch,
Sears Stock No.
2782 or
Pump Guard II
Switch, Sears
Stock No.
2721
Captive
Air® Tank
12"
Max
NOTICE: Install relief
valve not more than
24" from tank.
TANK SIZES
19 GALLON
36 GALLON
50 GALLON**
85 GALLON**
High capacity pumps
should be used with the 50 or 85
gallon tank only.
** 1-1/4” to 1” reducer required
for 1” piping.
Note: Relief Valve (No. 2729)
must be purchased separately.

If your system can develop more than
100 PSI pressure, install a Sears No.
2729 relieve valve in system to prevent
possibility of tank blow-up.
NOTICE: All Captive Air®Tanks except Models 390.291198
and 390.291358 are designed to operate in the vertical
position.
The tank is shipped from the factory with a pre-charge of
air. This system DOES NOT require the use of any outside
air charging devices such as air volume controls on jet
pumps, or bleeder orifices on submersible pumps.
Captive Air®Tanks can be connected together to increase
the supply of usable water (drawdown). Two tanks of the
same size will double the supply and three tanks will triple
the supply. See Figures 8 and 9 for typical installations.
When using a submersible pump, the manifold and switch
assembly must be installed in the pipe line as close to the
center of the tanks as possible. See Figures 8 and 9.
BEFORE YOU START YOUR PUMP
Your tank is factory charged with forty (40) pounds of air
pressure. To determine pressure switch setting, see pump
owner’s manual. If your pump pressure switch cut-in set-
ting is less than forty (40) pounds, the tank air pressure
MUST be reduced to this cut-in pressure switch setting
(see table). To do this, bleed air from the valve located on
top of the tank. Check pressure frequently with an accu-
rate tire pressure gauge until correct pressure has been
reached.
Conventional pump pressure switch settings on SEARS
pumps are as follows:
CUT IN/CUT OFF PRECHARGE
20/40 PSI 20 PSI
30/50 PSI 30 PSI
40/60 PSI 40 PSI
NOTICE: For years of trouble free service, check pre-
charge annually. See service hints (Page 7) for procedure.
NOTICE: Release and expel all air out of the piping sys-
tem and the water reservoir portion of the Captive Air®
Tank. This is required on new installations, pumps requir-
ing repriming and pumps that have been apart for service.
To accomplish this, open faucets farthest away from tank
and start the pump. Observe the sputtering water flow
from faucets. This is a mixture of air and water. Allow
pump to run until there is a steady air free stream of water.
Open and close faucets repeatedly until you are sure all air
has been removed.
If air continues to remain in system, check for leaks in pip-
ing on suction side of pump system (Jet Pumps Only).
If you have a submersible pump, remove the bleeder ori-
fices in the pipe (just below the well seal) and replace
bleeder orifice with pipe plugs.
6
INSTALLATION
OPERATION
FIGURE 8 FIGURE 9
From
Well
To
Service
Tanks
Pressure
Switch
From
Well
To
Service
Tanks
Pressure
Switch
Tanks
From
Well
Pressure Switch and 27229
Relief Valve Location When
Using Submersible Pump
Pressure Switch and 27229
Relief Valve Location When
Using Submersible Pump
To
Service
To
Service
From
Well
Tanks

7
NOTICE: To prevent waterlogging, check tank air charge
annually.
TO CHECK TANK AIR CHARGE
If drawdown (amount of water that comes out of tank per
pump cycle) decreases significantly, check as follows:
1. Check air charge in tank. Shut off electric power to
pump, open faucet near tank, and drain completely.
2. At the air valve in top of tank, check air pressure with
standard tire pressure gauge. Air pressure should be the
same as pump pressure switch cut-in setting.
3. If the air pressure is below the cut-in setting, add air to
the tank. Use an air compressor or a portable air storage
tank.
4. Use soap or liquid detergent to check for air leaks
around air valve. Continuous bubbling indicates a leak.
If necessary, install new core in air valve. This is the same
as those used for automobile tubeless tires.
TO CHECK PUMP PRESSURE SWITCH
1. Start the pump and allow the pressure switch to shut it
off.
2. Check the tank air pressure with the tire gauge. It should
be the same as the cut-off pressure for your system. (See
“OPERATION” section on Page 6 for correct pressures).
3. If the pressure reading is different from your system rec-
ommended pressure, the switch should be replaced.
REPLACEMENT OF AIR VALVE
If air valve becomes broken, or leaks beyond repair, it may
be necessary to replace it.
It is a standard tubeless tire valve which snaps in position
in groove as it is pulled up thru hole from inside tank.
1. Disconnect power to pump.
2. Relieve (drain) ALL water in system by opening faucet
closest to tank.
3. Relieve (expel) ALL air pressure in tank by removing
core from inside of valve.
4. Disconnect outside piping only to tank.
OPERATION
FIGURE 11
FIGURE 12
SERVICE HINTS
FIGURE 10
Tank is nearly empty:
Water storage bag is at bot-
tom. Air expands to fill space
above bag. The pump starts.
Water starts to fill the bag:
As bag fills, air above the
bag is compressed.
Bag is full to capacity:
Air is compressed to the
utmost for maximum draw-
down. The pump stops.
Water is being drawn
from the bag:
Compressed air in the
tank forces water out.
WATER
WATER
WATER
ABCD
Vinyl
bag
Remove nuts
( 6 Places)
Remaining portion
of valve stem
1448 0195
Groove
1449 0195

5. With sharp knife, cut off stem as close to tank as pos-
sible. Push remaining portion into tank.
6. Lay tank on side and remove six (6) nuts from studs. Tap
cover to break seal and remove cover assembly from
tank. You can now see the vinyl bag. See Figure 11.
7. Before removing vinyl bag from groove seat in tank, BE
SURE all water is drained from bag. This can be ac-
complished by tipping tank upright and allowing re-
maining water to drain.
8. Carefully remove lip portion of bag from groove seat
and push bag into tank.
9. Block up tank as shown in Figure 13. This will allow
cut off portion of stem to slide down to bottom of tank.
Reach in around bag until you find it and remove it.
10. Wipe a thin film of soapy solution on top half of re-
placement stem and insert in stem hole in top of tank.
It is necessary to use a valve stem pulling tool to pull
stem thru opening. This tool is the same as used by
your local filling station and Sears Automotive Center
when servicing tubeless tires.
11. Pull neck of bag out of tank opening and seat in groove.
BE SURE ring groove is clean.
12. Clean sealing surface of cover assembly and place on
studs.
13. Hand tighten all nuts on studs.
It is important that nuts be tightened as
follows: First, hand tighten all nuts. Then tighten one
nut to a snug fit. Next, tighten the one opposite to a
snug fit. Proceed, tightening the others in opposite
pairs to a snug fit. Recheck all nuts in same opposite
patterns to be sure they are evenly tightened and you
have a good seal. DO NOT overtighten, as you may
twist the studs off the tank. With a torque wrench,
tighten to 85 inch pounds.
14. Tip tank upright and assemble for operation.
15. Recharge tank with proper amount of air.
TESTING FOR LEAKAGE OF VINYL BAG
1. Disconnect power to pump.
2. Relieve (drain) ALL water in system by opening faucet
closest to tank.
3. Relieve (expel) ALL air pressure in tank by removing
core from inside of air valve.
4. Disconnect outside piping only to tank.
5. Turn tank upside down.
NOTICE: BE CAREFUL not to damage air valve when
tipping tank. Removal of air valve is not required. If
water leaks out of the valve core opening, the vinyl bag
has a hole in it and must be replaced.
PROCEDURE FOR REPLACING VINYL
BAG
Be sure all air has been expelled from tank
before removing nuts.
FOR 6, 19 AND 36 GALLON TANKS
1. Carefully lay tank on its side.
2. Remove nuts around cover plate.
3. Tap cover to break the seal and remove cover assembly
from tank. You can now see the vinyl bag.
4. Bag cannot be removed in one piece. Wherever con-
venient, grip bag with pliers and pull outward. At the
same time cut bag with sharp knife or single-edged
razor blade. Continue pulling and cutting until bag is
completely removed.
5. Clean and dry inside of tank.
NOTICE: Before replacement bag can be inserted in tank,
it must be tightly rolled up as follows:
1. Place bag on clean surface with opening up.
2. Flatten bag and force air out.
3. Tightly roll bag towards center opening.
4. Before center opening is covered up, force air out of re-
maining portion of bag.
5. Finish rolling bag.
6. As an aid for inserting bag in tank, sprinkle outside with
talcum powder.
7. With tank upside down, push tightly rolled bag into
tank.
8. Put your arm in bag and push sidewalls outward. It is
NOT important that all wrinkles be removed.
9. Clean flange ring and groove of tank.
10. Pull lip of bag through tank opening and place in ring
groove.
11. MAKE SURE it seals properly in groove.
12. Clean sealing surface of cover assembly and place on
studs.
8
SERVICE HINTS
FIGURE 13
1450 0195
Cut off portion of stem
slides to the bottom of tank.
Reach in here
to retrieve stem.

13. Install nuts and washers on studs. Hand tighten all nuts.
It is important that nuts be tightened as
follows: First, hand tighten all nuts. Then tighten one
nut to a snug fit. Next, tighten the one opposite to a
snug fit. Proceed, tightening the others in opposite
pairs to a snug fit. Recheck all nuts in same opposite
patterns to be sure they are evenly tightened and you
have a good seal. DO NOT overtighten, as you may
twist the studs off the tank. With a torque wrench,
tighten to 85 inch pounds.
14. Tip tank upright and reassemble for operation.
15. Recharge tank with proper amount of air.
FOR 50 AND 85 GALLON TANKS
Be sure all air has been expelled from tank
before removing nuts.
1. Carefully lay tank on its side.
2. Remove nuts around cover plate.
3. Tap cover to break the seal and remove cover assembly
from tank. You can now see the vinyl bag.
4. Bag cannot be removed in one piece. Wherever con-
venient, grip bag with pliers and pull outward. At the
same time cut bag with sharp knife or single-edged
razor blade. Continue pulling and cutting until bag is
completely removed.
5. Clean and dry inside of tank.
6. Place bag on its side on dry clean surface.
7. Flatten bag and force air out.
8. Starting on one side, tightly roll bag to other side.
NOTICE: Before opening is rolled closed, force re-
maining air out.
9. Finish rolling bag.
10. As a aid for inserting bag in tank, sprinkle outside with
talcum powder.
11. With tank on its side, push tightly rolled bag into tank
opening.
NOTICE: Push bag in tank only the length of the rolled
bag.
12. Insert arm in bag and push sidewalls outward. It is NOT
important that all wrinkles be removed.
13. Clean flange ring and groove to tank.
NOTICE: Two people are required for the following
steps:
14. Holding the bag, stand tank open end up.
NOTICE: DO NOT damage air valve. It may be of help
to lean tank in corner.
15. Pull lip ring of bag through tank opening and place in
ring groove.
16. MAKE SURE it seats properly in groove.
17. Clean sealing surface of cover assembly and place on
studs.
18. Install nuts and washers on studs. Hand tighten all nuts.
NOTICE: It is important that nuts be tightened as fol-
lows: First, hand tighten all nuts. Then tighten one nut
to a snug fit. Next, tighten the one opposite to a snug
fit. Proceed, tightening the others in opposite pairs to
a snug fit. Recheck all nuts in same opposite patterns
to be sure they are evenly tightened and you have a
good seal. DO NOT overtighten, as you may twist the
studs off the tank. With a torque wrench, tighten to 85
inch pounds.
19. Tip tank upright and reassemble for operation.
20. Recharge tank with proper amount of air.
9
SERVICE HINTS

10
To order parts, call:
Sears Product Service
1-800-366-7278
PUMP TO TANK FITTINGS PACKAGE NO. 2788
REPAIR PARTS
Pump to tank fittings Package No. 2788 is not furnished.
You may purchase it at your local Sears Store.
Required to install all SEARS Captive Air®Tanks with shal-
low/deep well jet pump.
3
1
2
459
6
7
8
KEY PART PART
NO. NO. DESCRIPTION
1U78-777PA Adapter - 1” NPT (Male) by 1” Insert (2 Req.)
2U78-770P Elbow - 3/4” NPT (Male) by 1” Insert
3U74-37J Hose
4U19-55SS Clamp - Hose (2 Req.)
5U30-701ZP Bolt - 3/8” - 16 x 1-3/4” Lg. (2 Req.)
6U43-62ZP Flat Washer - 3/8” (2 Req.)
7U43-12ZP Lock Washer - 3/8” (2 Req.)
8U36-38ZP Nut - Hex 3/8” - 16 (2 Req.)
9U78-769P Elbow - 1” NPT (Male) by 1” Insert (2 Req.)
CAPTIVE AIR®TANK
(6 GALLON) MODEL 390.291198
(19 GALLON) MODEL 390.291358
2878 0697
1
2
4
3
REPAIR PARTS
MODEL MODEL
KEY 390.291198 390.291358 PART
NO. PART NO. PART NO. DESCRIPTION
•U20-7 U20-13 Bag - Vinyl
1U31-442P – Inlet Flange
1A – U31-446P Inlet Flange
2U36-202BT† U36-202BT† Nut 5/16 - 18 Hex (6 Req.)
3– U78-777PA Adapter 1” NPT Male
3U78-770P – Elbow - 3/4” NPT
(Male) by 1” Insert
4U212-160† U212-160† Air Valve w/Cap
• Not Illustrated.
† Standard hardware item, may be purchased locally.

11
To order parts, call:
Sears Product Service
1-800-366-7278
CAPTIVE AIR®TANK
REPAIR PARTS
390.291558 390.291658 390.291698 390.291758
Key 19 Gallon 36 Gallon 50 Gallon 85 Gallon Part
No. Tank Tank Tank Tank Description
1U20-8 U20-9 U20-10 U20-14 Bag - Vinyl
2U31-446P U31-446P U31-447P U31-447P Inlet Flange
3U36-202BT† U36-202BT† U36-202BT† U36-202BT† Nut - 5/16 - 18 Hex. (6 Req.)
4U212-160† U212-160† U212-160† U212-160† Air Valve w/cap
†Standard hardware item, may be purchased locally.
1
2
3
4
2399 0496SRS
MODEL 390.291558 (19 GALLON)
MODEL 390.291658 (36 GALLON)
MODEL 390.291698 (50 GALLON)
MODEL 390.291758 (85 GALLON)
NOTICE: 50 and 85 gallon tanks
are not equipped with mounting
bracket. Install pump beside tank
as shown on Page 5.

For the repair or replacement parts you need
Call 7 am - 7 pm, 7 days a week
1-800-366-PART
(1-800-366-7278)
For in-home major brand repair service
Call 24 hours a day, 7 days a week
1-800-4-REPAIR
(1-800-473-7247)
For the location of a
Sears Repair Service Center in your area
Call 24 hours a day, 7 days a week
1-800-488-1222
For information on purchasing a Sears
Maintenance Agreement or to inquire
about an existing Agreement
call 9 am - 5 pm, Monday-Saturday
1-800-827-6655
MAINTENANCE
AGREEMENT
America's Repair Specialists
REPAIR SERVICES
America's Repair Specialists
REPAIR SERVICES
America's Repair Specialists
REPAIR SERVICES
OWNER’S
MANUAL
Model No.
390.291198
390.291358
390.291558
390.291658
390.291698
390.291758
The model number of
your Captive Air®Tank
will be found on a label
attached to the tank.
When requesting service
or ordering parts, always
give the following
information:
• Product Type
• Model Number
• Part Number
• Part Description
Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.
CAPTIVE AIR®TANK
®