Power-Flo Pumps & Systems • 877-24PUMPS • www.powerflopumps.com
ISP No. pfext ISP - 1/2021
Part
Number
Capacity Connection
Max
Temp
Pre-
Charge
Max Working
Pressure
Wt.
lbs
PFEXT2H
2 gal
1/2” NPT
240° F
12 PSI
100 PSI
5
PFEXT4H
4 gal
1/2” NPT
240° F
12 PSI
100 PSI
9
PFEXT8H
8 gal
1/2” NPT
240° F
12 PSI
100 PSI
14
PLEASE READ THE FOLLOWING INSTRUCTIONS CAREFULLY
INSTALLER: LEAVE THIS MANUAL WITH THE END USER
READ CAREFULLY THE PRODUCT
INSTALLATION, OPERATING AND
MAINTENANCE INSTRUCTIONS. FAILURE TO FOLLOW THE
INSTRUCTIONS AND WARNINGS IN THE MANUAL MAY
RESULT IN SERIOUS OR FATAL INJURY AND/OR PROPERTY
DAMAGE, AND WILL VOID THE PRODUCT WARRANTY.
THIS PRODUCT MUST BE INSTALLED BY A QUALIFIED
PROFESSIONAL. FOLLOW ALL APPLICABLE LOCAL AND
STATE CODES AND REGULATIONS, IN THE ABSENCE OF
SUCH CODES, FOLLOW THE CURRENT EDITIONS OF THE
NATIONAL PLUMBING CODE AND NATIONAL ELECTRIC
CODE, AS APPLICABLE.
This is the safety alter symbol. It is used to alert you
to potential personal injury and other hazards. Obey
all safety messages that follow this symbol to reduce
the risk possible injury as well as property damage.
NOTE:
Inspect for shipping damage and notify carrier or store
where purchased immediately if damage is present. To avoid
risk of personal injury and property damage, if the product
appears to be malfunctioning or shows signs of corrosion,
call a qualified professional immediately. Use proper safety
equipment when installing.
FAILURE TO PROPERLY SEAL VALVE CAP
WILL RESULT IN LOSS OF PRECHARGE
CAUSING PRODUCT TO FAIL.
This product, like most products under
pressure, may over time corrode, weaken,
burst or explode, causing serious or fatal personal injury,
leaking or flooding and/or property damage. To minimize risk,
a licensed professional must install and periodically inspect and
services the product. A drop pan connected to an adequate
drain must be installed if leaking or flowing could cause
property damage. Do not locate in an area where leaking could
cause property damage to the area adjacent to the appliance
or to lower floors of the structure.
EXPLOSION OF RUPTURE HAZARD.
A relief valve must
be installed to prevent pressure in excess of local code
requirement or maximum working pressure designated in the
Product Manual, whichever is less.
Do not expose product to
freezing temperatures or temperatures in excel of 240°F.
Do
not adjust the pre-charge or re-charge this product except for
any adjustments at the time of the initial installation, especially
if product is corroded, damaged or with diminished integrity.
Adjustments to pre-charge must be done at ambient
temperature only. Failure to properly size the product or follow
these instructions may result in excess strain on the system
and may lead to product failure, serious or fatal personal injury,
leakage, and/or property damage.
Mount vertically only. Do not mount on
dead-end pipe.
FOR USE IN CLOSED HYDRONIC SYSTEMS ONLY:
Do not
install for domestic water systems, or in open heating systems.
Corrosion and tank failure may result.
Pre-Installation
1. Visually inspect the tank for any damage.
2. Adjust pre-charge to equal system fill pressure.
3. Replace and tighten plastic cap on air fitting.
Installation
1. Drain the boiler system or isolate the area where the tank will
be installed.
2. Install the tank on the supply side of the boiler, on the
suction –side of the heating circulator(s) (see Figure 1).
3. Once the tank is installed, re-pressurize the system and check
for leaks. Repair as necessary.
4. Restart the boiler system and check for relief valve discharge.
If the relief valve drips, the tank may be improperly charged or
undersized.
5. The tank is now operational and will absorb expanded water
during boiler operation.
PFEXT - Power-Flo Expansion Tanks
WARNING:
CANCER AND REPRODUCTIVE HARM-
WWW.P65WARNINGS.CA.GOV
