Pentair WellMate SSWM4 User manual

OWNER’S MANUAL
WellMate
Steel Pressure Tanks
©2014 WM808 (02/20/14)
4108 1101 ASB WM
PENTAIR WATER
220 Park Drive,
Chardon, OH 44024
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Safety 2
READ AND FOLLOW
SAFETY INSTRUCTIONS!
This is the safety alert symbol. When you
see this symbol on your pump or in this
manual, look for one of the following signal words
and be alert to the potential for personal injury.
warns about hazards that will cause
serious personal injury, death or major property
damage if ignored.
warns about hazards that can cause
serious personal injury, death or major property
damage if ignored.
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 pump.
Keep safety labels in good condition.
Replace missing or damaged safety labels.
RULES FOR SAFE
INSTALLATION AND
OPERATION
Read the Owner’s Manual and Rules for Safe
Operation and Installation Instructions carefully.
Failure to follow these Rules and Instructions could
cause serious bodily injury and/or property damage.
Install system according to local codes.
Always test water from well for purity before using.
Check your local health department for testing
procedure.
Before installing or servicing your tank, BE SURE
pump electric power source is disconnected.
BE SURE your pump electrical circuit is properly
grounded.
Remove bleeder orifices, air volume controls or
other air charging devices in existing system.
To prevent possible serious or fatal
injury and/or damage to equipment, system pres-
sure must be less than 100 pounds per square inch
(PSI) under any circumstances. Failure to follow
this instruction can result in tank blowup. If system
discharge pressure can exceed 100 PSI, install a
relief valve capable of passing the full pump vol-
ume at 100 PSI.
Hazardous pressure. Read owner’s
manual before attempting to install, operate, or
service this tank. To avoid possible equipment fail-
ure, severe injury, and property damage, do not
allow pump, tank, or piping system to freeze.
LIMITED WARRANTY
PENTAIR WATER, warrants to the original consumer of the products listed below, that they will be free
from defects in material and workmanship for the Warranty Period from the date of original installation
or manufacture as noted.
Product Warranty Period
WellMate Steel Pressure Tanks 5 years from date of original installation
Our warranty will not apply to any product that has been subject to negligence, misapplication, improper
installation or maintenance.
Buyer’s only remedy and PENTAIR WATER’s only duty is to repair or replace defective products (at
PENTAIR WATER’s choice). Buyer agrees to pay all labor and shipping charges associated with this
warranty and to request warranty service through the installing dealer as soon as a problem is discov-
ered. If warranty service is requested more than 30 days after the Warranty Period has ended, it will
not be honored.
PENTAIR WATER SHALL NOT BE LIABLE FOR ANY CONSEQUENTIAL, INCIDENTAL, OR
CONTINGENT DAMAGES WHATSOEVER.
THE FOREGOING WARRANTIES ARE EXCLUSIVE AND IN LIEU OF ALL OTHER EXPRESS
WARRANTIES. IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, SHALL NOT
EXTEND BEYOND THE WARRANTY PERIOD PROVIDED HEREIN.
Certain states do not permit the exclusion or limitation of incidental or consequential damages or the
placing of limitations on the duration of an implied warranty, therefore, the limitations or exclusions
herein may not apply. This warranty sets forth specific legal rights and obligations, however, additional
rights may exist, which may vary from state to state.
Supersedes all previous publications.
PENTAIR WATER, 220 Park Drive, Chardon, OH 44024
Phone: [phone] • Fax: [phone]

General Information 3
GENERAL INFORMATION
All tanks are factory pre-charged with air to 40
pounds per square inch (PSI). When installing tank,
reduce pre-charge to 2 PSI below pump cut-in pres-
sure setting. To do this, bleed air from valve on top
of tank.
NOTICE: Always set pre-charge with NO WATER
in tank.
Check pressure frequently with an accurate tire
pressure gauge until correct pressure has been
reached. For correct pre-charge pressure settings,
see Chart 1, below.
CHART I
NOTICE: Replace and tighten air valve cap if it is
removed for any reason. Failure to replace air cap
may allow loss of air pressure and eventually lead
to tank waterlogging and water cell failure.
Pre-charged storage 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 No. 1A and 1B for typical installations
of this kind.
OPERATING CYCLE
1. Tank nearly empty – air expands filling area
above water cell (Fig. 2A).
2. Water begins to enter tank – air is compressed
above water cell as it fills with water (Fig. 2B).
3. Pump-up cycle completed – air now com-
pressed to cut off setting of pressure switch (Fig.
2C).
4. Water being drawn from tank – compressed
tank air forces water out of water cell (Fig. 2D).
5. Water cell completely empty – new cycle ready
to begin (Fig. 2A).
CHART II – Water Yield Per Pump Cycle
(drawdown) in U.S. Gallons
Pressure Switch Setting Tank Precharge (PSI)
20-40 PSI 18
30-50 PSI 28
40-60 PSI 38
Model
Pressure Switch Setting (PSI)
20-40 30-50 40-60
SSWM4, SWM4 4.8 4.1 3.6
SSWM6SQ
SWM6SQ 6.9 5.8 5.0
SSWM6, SWM6 6.9 5.8 5.0
SSWM9, SWM9 11.6 9.8 8.5
SSWM10SQ
SWM10SQ 12.7 10.7 9.3
SSWM14
SWM14 18.3 15.5 13.4
SSWM20
SWM20 21.4 18.3 16.0
SSWM25M
SWM25 30.0 26.0 22.0
SSWM35M
SWM35 41.3 35.4 31.0
From
Well
To
Service
From
Well
To
Service
Tanks
Tanks
Pressure Switch
Pressure Switch
191 0893
Figure 1A
From
Well
To
Service
From
Well
To
Service
Tanks
Tanks
Pressure Switch
Pressure Switch
191 0893
Figure 1B
Figure 2
WATER
WATER
WATER
ABCD
157 1013
WATER
WATER
WATER
ABCD
157 1013

Installation 4
Connect system pipe to tank flange. Use plastic or
steel pipe as required. To prevent leaks, use Teflon
tape or Plasto-Joint Stik1on male threads of all
threaded connections to tank.
NOTICE: To be sure that joint is not cross-threaded
and that threads are clean, always make connec-
tions by hand (without sealer) first. After making
sure that threads are clean, remove pipe, add Teflon
tape or Plasto-Joint Stik, and remake connection.
Tighten by hand first; finish with pipe wrench for
tight seal.
NOTICE: When replacing a standard tank in a sub-
mersible pump system, raise pump and discharge
pipe far enough to remove bleeder orifices in dis-
charge pipe and plug tees. When replacing a stan-
dard tank in a jet pump system, remove Air Volume
Control (AVC) and plug AVC port in pump.
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 to two PSI below
the pump cut-in setting of the pressure switch.
It is necessary to flush all air out of the piping sys-
tem and water reservoir portion of the pre-charged
tank. This is required on new installations, pumps
requiring repriming and pumps that have been dis-
assembled for service. Do this as follows:
1. Open faucets furthest from tank and allow
pump to operate.
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.
TO CHECK TANK AIR CHARGE
If drawdown (amount of water that comes out of
tank per pump cycle) decreases significantly, check
as follows:
1. To 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 pres-
sure with a standard tire gauge. Air pressure
should be 2 PSI below pump pressure switch
cut-in setting.
3. If the air pressure is more than 2 PSI 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 SETTING
1. To check pressure switch setting, disconnect
power to pump at supply panel (but be sure to
leave pressure switch connected to power sup-
ply wires).
2. Remove pressure switch cover.
3. Open a faucet near tank.
4. Bleed pressure down until pressure switch con-
tacts close; immediately close faucet.
5. Check pressure at valve with standard tire gauge
or with pump pressure gauge (if supplied).
6. Pressure gauge should read 2 PSI below pump
cut-in setting (28 PSI for 30-50 switch, 18 PSI
for 20-40 switch, etc.) If not:
A. Adjust switch according to switch manufac-
turer’s instructions.
SPECIFICATIONS
Model
Maximum
Capacity
U.S. Gallons
Tank
Diameter
Tank
Height
Tank
Discharge
Tapping
SSWM4, SWM4 14 16” 22-1/4” 1”
SSWM6SQ, SWM6SQ 20 20” 22” 1”
SSWM6, SWM6 20 16” 27-1/2” 1”
SSWM9, SWM9 32 16” 42-3/4” 1”
SSWM10SQ, SWM10SQ 35 20” 32-3/4” 1”
SSWM14M, SWM14 50 24” 32-1/2” 1-1/4”
SSWM20, SWM20 62 24” 39-1/8” 1-1/4”
SSWM25, SWM25 85 24” 50-1/2” 1-1/4”
SSWM35M, SWM35 119 24” 68” 1-1/4”

Installation 5
B. Reconnect power supply to pump and pump
up pressure in system.
C. Disconnect power supply to pump again and
re-check switch setting.
D. Repeat until pressure switch starts pump
within ±1 PSI of proper setting.
E. If cut-in setting is too low, system will rattle
or develop water hammer when pump starts.
F. Cut-out setting is not as critical as cut-in set-
ting. Make sure that pump will stop running
in a reasonable time. If it does not, cut-out
setting may need to be adjusted down slight-
ly. Be sure that after readjustment, system
does not rattle or hammer on startup.
7. Re-check tank air pre-charge to be sure it is 2
PSI below pump pressure switch cut-in setting
(see Page 3).
WATER CELL LEAK TEST
1. Disconnect power to pump.
2. Drain all water from tank water cell by opening
faucet closest to tank.
3. Remove valve cap from valve and release all
pressure possible by depressing valve core.
When air stops coming from valve, remove
valve core to release remaining pressure.
4. Disconnect piping from elbow on tank flange.
5. Carefully turn tank upside down or lay it on its
side.
Retained water in tank may cause
sudden weight shift when lowering. Support
tank so that it cannot fall when being lowered
or inverted.
6. If Water cell leaks, water will run out of valve. If
so, replace water cell.
WATER CELL REPLACEMENT
To be sure cover flange cannot blow
off of tank, release all air from system before
removing nuts from cover flange.
1. Disconnect power to pump.
2. Follow steps 2 through 5 under “Testing For
Water Cell Leakage”, above.
3. Remove nuts from tank cover flange. Tap cover
flange to break seal and remove.
4. Water cell will not come out in one piece.
Hold water cell with pliers and cut wherever
convenient with single edge razor blade or
sharp knife. Continue holding and cutting until
water cell is removed.
5. Clean and dry inside of tank.
6. Before water cell can be inserted into tank, it
must be tightly rolled up as follows:
A. Place water cell on clean surface with open-
ing to one end and flatten to force air out.
Pull ends out flat (see Figure 3).
B. To get tightest possible wrap, start on one
side at top and TIGHTLY roll water cell diag-
onally to other side (see Figure 4). To force
out as much air as possible, be sure to roll
toward water cell neck opening.
7. To help insert water cell, sprinkle outside of it
with talcum powder. With tank on its side, push
tightly rolled water cell into tank, hooking water
cell neck ring over edge of tank head.
8. Insert arm in water cell and push sidewalls out-
ward. It is not necessary to remove all wrinkles
from water cell.
NOTICE: Don’t push water cell into tank further
than its own length. In a large tank, water cell
can slip out of reach if pushed too far.
9. Clean tank head sealing surface and lip ring
groove of cover flange.
10. Pull lip ring of water cell through tank opening
and seat it against tank head.
11. Clean sealing surface and groove of cover
flange; place on tank (see Figure 5).
Figure 5 – Proper installation and
seating
Water
Cell
Tank
Wall
Cover
Flange
2822 0597
Figure 3 – Force all air out of water
cell
2846 0597
Pull ends out flat
Figure 4 – Roll diagonally toward neck
2847 0597
Roll Diagonally