PENTAIR PSP973 Pro Source Plus Steel Pressure Tanks Owner’s Manual
- June 10, 2024
- Pentair
Table of Contents
SAT-RITE®
OWNER’S MANUAL
PRO-Source® Plus
Steel Pressure Tanks
PSP973 Pro Source Plus Steel Pressure Tanks
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.
DANGER warns about hazards that will cause serious personal injury, death
or major property damage if ignored.
WARNING warns about hazards that 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 pump.
Keep safety labels in good condition.
Replace missing or damaged safety labels.
California Proposition 65 Warning
WARNING This product and related accessories contain chemicals known to
the State of California to cause cancer, birth defects or other reproductive
harm.
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.
WARNING Hazardous pressure. To prevent possible serious or fatal injury
and/or damage to equipment, system pressure must be less than 100 pounds per
square inch (PSI) (Models PSP19 and PSP35) or 125 PSI (Models PSP50 and PSP85)
under any circumstances. Failure to follow this instruction can result in tank
blowup. If system discharge pressure can exceed listed pressures, install a
relief valve capable of passing the full pump volume at listed pressures.
WARNING Hazardous pressure. Read owner’s manual before attempting to
install, operate, or service this tank. To avoid possible equipment failure,
severe injury, and property damage, do not allow pump, tank, or piping system
to freeze.
General Information
GENERAL INFORMATION
All tanks are factory pre-charged with air. When installing tank, adjust pre-
charge to 2 PSI below pump cut-in pressure setting. To do this, bleed or
add air through valve on top of tank.
NOTICE: Transport and install tank in vertical position ONLY!
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
| Pressure Switch Setting | Tank Pre-charge (PSI) |
|---|---|
| 20-40 PSI | 18 |
| 30-50 PSI | 28 |
| 40-60 PSI | 38 |
Tank Pre-charge Settings for use with PENTEK INTELLIDRIVE Variable
Frequency Drives
Set the pressure tank’s pre-charge to 70% of the system operating pressure.
When using an external set point as well as an internal set point, precharge
the tank to 70% of the lower set point of the two. Some applications may
require a different percentage when figuring the set point. Refer to your
PENTEK INTELLIDRIVE operator’s manual for additional information.
NOTICE: Replace and tighten air valve cap if it is re moved 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
- Tank nearly empty – air expands filling area above vinyl water cell (Fig. 2A).
- Water begins to enter tank – air is compressed above water cell as it fills with water (Fig. 2B).
- Pump-up cycle completed – air now compressed to cut off setting of pressure switch (Fig. 2C).
- Water being drawn from tank – compressed tank air forces water out of water cell (Fig. 2D).
- Water cell completely empty – new cycle ready to begin (Fig. 2A).
CHART II – Water Yield Per Pump Cycle (drawdown) in Gallons
| Pressure Switch Setting (PSI)
---|---
Model| 20-40| 30-50| 40-60
PSP19S-TO2SA-25PSI| 6.90| 5.80| 5.00
PSP19T-TO2SA-25PSI| 6.90| 5.80| 5.00
PSP35-TO5SA-25PSI| 12.70| 10.70| 9.30
PSP5O-T5OSA-25PSI| 18.30| 15.50| 13.40
PSP85-T52SA-25PSI| 30.00| 26.00| 22.00
Installation
Connect system pipe to tank flange. Use plastic or steel pipe as required. To
prevent leaks, use PTFE pipe thread sealant tape on male threads of all
threaded connections to tank.
NOTICE: To be sure that joint is not crossthreaded and that threads are
clean, always make connections by hand (without sealer) first. After making
sure that threads are clean, remove pipe, add PTFE pipe thread sealant tape
and remake connection. Tighten by hand first; finish with pipe wrench for
tight seal.
NOTICE: When replacing a standard tank in a submersible pump system,
raise pump and discharge pipe far enough to remove bleeder orifices in
discharge pipe and plug tees. When replacing a standard 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 system and water reservoir
portion of the precharged tank. This is required on new installations, pumps
requiring re-priming and pumps that have been disassembled for service.
Do this as follows:
- Open faucets furthest from tank and allow pump to operate.
- Air in the system will cause a sputtering flow; allow faucets to run until you have a steady, air free stream.
- Open and close faucets repeatedly until you are sure all air has been removed.
- 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:
- To check air charge in tank, shut off electric power to pump, open faucet near tank, and drain completely.
- At the air valve in top of tank, check air pressure with a standard tire gauge. Air pressure should be 2 PSI below pump pressure switch cut-in setting.
- 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.
- 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
- To check pressure switch setting, disconnect power to pump at supply panel (but be sure to leave pressure switch connected to power supply wires).
- Remove pressure switch cover.
- Open a faucet near tank.
- Bleed pressure down until pressure switch contacts close; immediately close faucet.
- Check pressure at valve with standard tire gauge or with pump pressure gauge (if supplied).
- 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 manufacturer’s instructions.
SPECIFICATIONS****
Model| Maximum Capacity U.S. Gallons| Tank Diameter| Tank
Height| Tank Discharge Tapping
---|---|---|---|---
PSP19S-TO2SA-25PSI| 19| 20″| 22″| 1″
PSP19T-TO2SA-25PSI| 19| 16″| 27-1/2″| 1″
PSP35-TO5SA-25PSI| 35| 20″| 32-3/4″| 1″
PSP5O-T5OSA-25PSI| 50| 24″| 32-1/2″| 1-1/4″
PSP85-T52SA-25PSI| 85| 24″| 50-1/2″| 1-1/4″
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 setting. Make sure that pump
will stop running in a rea son able time. If it does not, cut-out setting may
need to be adjusted down slightly. Be sure that after readjustment, system
does not rattle or hammer on startup.
- Re-check tank air pre-charge to be sure it is 2 PSI below pump pressure switch cut-in setting (see Page 3).
TESTING FOR WATER CELL LEAKAGE
-
Disconnect power to pump.
-
Drain all water from tank water cell by opening faucet closest to tank.
-
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. -
Disconnect piping from elbow on tank flange.
-
Carefully turn tank upside down or lay it on its side.
WARNING Retained water in tank may cause sudden weight shift when lowering.
Support tank so that it cannot fall when being lowered or inverted. -
If water cell leaks, water will run out of valve. If so, replace water cell.
WATER CELL REPLACEMENT
CAUTION To be sure cover flange cannot blow off of tank, release all air
from system before re moving nuts from cover flange.
-
Disconnect power to pump.
-
Follow steps 2 through 5 under “Testing For Water cell Leakage”, above.
-
Remove nuts from tank cover flange. Tap cover flange to break seal and remove. Base will come off with flange.
-
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. -
Clean and dry inside of tank.
-
Before water cell can be inserted into tank, it must be tightly rolled up as follows:
A. Place water cell on clean surface with opening 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 diagonally to other side (see Figure 4). To force out as much air as possible, be sure to roll toward water cell neck opening. -
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.
-
Insert arm in water cell and push sidewalls outward. 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. -
Clean tank head sealing surface and lip ring groove of cover flange.
-
Pull lip ring of water cell through tank opening and seat it against tank head.
-
Clean sealing surface and groove of cover flange; place on tank (see Figure 5). Be sure to capture the base with the flange (the tabs on the base fit the notches on the flange).
NOTICE: Be sure discharge port lines up with hole in base. -
NOTICE: Tighten nuts as follows:
A. Hand tighten all nuts.
B. Tighten one nut snug.
C. Tighten opposite nut snug.
D. Proceed, tightening opposite pairs of nuts to a snug fit.
E. Recheck all nuts, using same pattern. Be sure all nuts are tight and that you have a good seal.
NOTICE: Do not overtighten; you may twist studs off of tank. If you have a torque wrench, tighten to 85 inch-pounds torque. -
Stand tank on feet and reconnect piping.
-
Recharge tank to proper air pressure (see Page 4).
-
Prime pump (see pump owner’s manual).
AIR VALVE REPLACEMENT
WARNING Hazardous Pressure. To be sure air valve and core cannot blow out
of tank, release all air pressure from tank before removing valve core or
valve.
-
Disconnect power to pump.
-
Drain ALL water in system by opening faucet closest to tank.
-
Depress valve core to release ALL air pressure in tank. When air stops coming out of valve, remove core from inside of valve to release remaining pressure.
-
Unscrew valve from tank and install new valve.
Do not overtighten. -
Recharge tank (see Page 4), turn on power, fill system, and tank is ready for service.
PIPING CONNECTIONS SUBMERSIBLE AND MULTI-STAGE INSTALLATIONS
NOTICE: When using metal pipe with plastic fittings use only PTFE pipe
thread sealant tape on male threads.
Tank with Submersible Pump
Tank with Multi-Stage Pump
Repair Parts
Models
PSP19S-T02SA-25PSI
PSP19T-T02SA-25PSI
PSP35-T05SA-25PSI
PSP50-T50SA-25PSI
PSP85-T52SA-25PSI
REPAIR PARTS LIST – Pro-Source Plus Tanks
Key No.| Part Description| No. Used| PSP19S-T02
SA-25PSI
19 Gal.| PSP19T-T02
SA-25PSI
19 Gal.| PSP35-T05
SA-25PSI
35 Gal.
---|---|---|---|---|---
1| Air Valve with Cap| 1| U212-266| U212-266| U212-266
2| Water cell – Vinyl| 1| U20-8| U20-15S| U20-13L
3| Base| 1| U31-505P| U31-505P| U31-505P
4| Cover Flange| 1| U31-511 SS*| U231-531| U231-531
5| Flanged Nut 5/16 – 18 Hex| 6| U36-202BT| U36-202BT| U36-202BT
- Does not require Stand Pipe.
Key No.| Part Description| No.
Used| PSP5O-T50
SA-25PSI
50 Gal.| PSP85-T52
SA-25PSI
85 Gal.
---|---|---|---|---
1| Air Valve with Cap| 1| U212-266| U212-266
2| Water cell – Vinyl| 1| U20-10| U20-17
3| Base| 1| U31-512P| U31-512P
4| Cover Flange| 1| U31-510SS*| U231-533
5| Flanged Nut
5/16 – 18 Hex| 6| U36-202BT| U36-202BT
- Does not require Stand Pipe.
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