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Diffuser

Air Charge

Lifting Ring

Elbow

Blind Flange

Flange Ring

Stand

Bladder

Adapter

Nut

Drain

Lifting Ring

THERM-X-TROL

® 

STL (CL) SERIES

FOR USE ONLY WITH POTABLE WATER SYSTEMS

REPLACEMENT BLADDER INSTRUCTIONS

READ CAREFULLY THE PRODUCT 

INSTALLATION INSTRUCTIONS.  FAILURE TO 

FOLLOW THE INSTRUCTIONS AND WARNINGS 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.

This Product, like most Products under pressure, 

may over time corrode, weaken and burst or 

explode, causing serious or fatal injury, leaking or flooding and/or property 

damage. To minimize risk, a licensed professional must install and 

periodically inspect and service the Product. A drip pan connected to an 

adequate drain must be installed if leaking or flooding 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 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. At least once every 

3 years or if discharge is present, a licensed contractor should inspect the 

temperature and pressure relief valve and replace if corrosion is evident 

or the valve does not function.  

FAILURE TO INSPECT THIS VALVE AS 

DIRECTED COULD RESULT IN UNSAFE TEMPERATURE OR 

PRESSURE BUILD-UP WHICH CAN RESULT IN PRODUCT FAILURE, 

SERIOUS INJURY OR DEATH AND/OR SEVERE PROPERTY DAMAGE 

AND VOID THE PRODUCT WARRANTY.

Use only with potable water systems. Do not 

operate in a setting with freezing temperatures or 

where the temperature can exceed 

240°F

 and do not exceed the 

maximum working pressure specified in the Manual. Mount vertically only.

Chlorine & Aggressive Water: 

The water quality 

can significantly influence the life of this Product.  

You should test for corrosive elements, acidity, total solids and other 

relevant contaminants, including chlorine and treat your water appropriately 

to insure satisfactory performance and prevent premature failure.

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 licensed 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.

Models ST-35L(CL) through ST-600L(CL)

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