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EXTROL

® 

AX SERIES

PRESSURIZED EXPANSION TANKS (ASME)

INSTALLATION & OPERATION INSTRUCTIONS

Models AX-15(V)-(DD) through AX-280(V)-(DD)

READ CAREFULLY THE PRODUCT 

INSTALLATION & OPERATION 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 LICENSED 

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. 

EXPLOSION OR RUPTURE HAZARD. THE 

EXPANSION TANK MUST BE OPERATED SO 

THAT THE PRESSURE DOES NOT EXCEED THE MAXIMUM 

WORKING PRESSURE.

EXPLOSION OR 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 excess of 240° F.  

Do not adjust the pre-charge or re-pressurize this Product except for any 

adjustments required at the time of 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 

excessive strain on the system lead to Product failure, serious or fatal 

personal injury, leakage and/or property damage.

Potable Water and Radiant Heating Warning.  

This Product must not be used in radiant heating, 

potable water or open systems of any kind.  These systems contain 

oxygenated water which will cause internal corrosion and premature 

Product failure.  Use a Therm-X-Trol

®

 for potable water systems and a 

Radiant Extrol

®

 for radiant heating systems.  Do not install on dead- 

end pipe.

This product can expose you to chemicals 

including lead, which is known to the State of 

California to cause cancer and birth defects or other reproductive harm. 

For more information go to www.P65Warnings.ca.gov. 

NOTE:

  Inspect for shipping damage and notify freight 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.  Current 

copies of the Product manual can be viewed at www.amtrol.com.  Use proper safety equipment when installing. 

THIS IS THE SAFETY ALERT 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 OF PERSONAL INJURY AS WELL AS 

PROPERTY DAMAGE.

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