Therm-X-Trol ST-80V - Water heater Amtrol - Free user manual and instructions
Find the device manual for free Therm-X-Trol ST-80V Amtrol in PDF.
Pick your language and provide your email: we'll send you a specifically translated version.
| Product Type | Thermal Expansion Tank |
| Brand | Amtrol |
| Model | Therm-X-Trol ST-80V |
| Capacity | 4.5 gallons (17 liters) |
| Connection Size | 1 inch NPT |
| Maximum Working Pressure | 150 psi (10.3 bar) |
| Maximum Temperature | 200°F (93°C) |
| Pre-Charge Pressure | 40 psi (2.8 bar) |
| Diaphragm Material | Butyl rubber |
| Tank Material | Steel with epoxy coating |
| Dimensions (Diameter x Height) | 8.5 inches x 15.5 inches |
| Weight | 12 pounds (5.4 kg) |
| Installation Orientation | Vertical or horizontal (with bracket) |
| Primary Function | Absorbs thermal expansion pressure in closed water heating systems |
| Maintenance | Check air pressure annually; replace if water leaks from air valve |
| Safety Feature | Prevents over-pressurization of water heater and plumbing |
| Spare Parts Available | Replacement bladder (Part # S-80V-BL) |
| Warranty | 5 years limited warranty |
| Compliance | ASME, CSA, and NSF 61 certified |
| General Information | Use with potable water systems only; do not exceed rated pressure/temperature |
Frequently Asked Questions - Therm-X-Trol ST-80V Amtrol
What is the purpose of the Therm-X-Trol ST-80V expansion tank?
The expansion tank absorbs excess water pressure caused by thermal expansion in a closed water heating system, preventing damage to the water heater and plumbing fixtures.
How do I install the ST-80V expansion tank?
Install the tank on the cold water supply line between the water heater and the shut-off valve. Use a 1-inch NPT connection. Ensure the tank is supported and the air valve is accessible.
What is the proper air pre-charge for the ST-80V?
The pre-charge should match the incoming water pressure, typically 40 psi (2.8 bar). Check and adjust with a tire gauge through the air valve when the system is depressurized.
How often should I maintain the expansion tank?
Annually, check the air pressure and inspect for leaks. If water drips from the air valve, the diaphragm is compromised and the tank needs replacement.
Can the ST-80V be used with a tankless water heater?
Yes, it can be used with any closed water heating system, including tankless heaters, to manage thermal expansion.
What is the maximum operating pressure and temperature?
The maximum working pressure is 150 psi (10.3 bar) and maximum temperature is 200°F (93°C). Exceeding these can cause failure.
How do I know if my expansion tank needs replacement?
If you hear water hammer, the pressure relief valve frequently discharges, or water comes out of the air valve, the tank may be waterlogged or the bladder ruptured. Replace it.
Is the ST-80V suitable for potable water?
Yes, it is NSF 61 certified for use with potable water systems.
What spare parts are available for the ST-80V?
The replaceable bladder/ diaphragm kit is available (Part # S-80V-BL). For other parts, contact Amtrol customer service.
What is the warranty coverage?
Amtrol offers a 5-year limited warranty against manufacturing defects. Proof of purchase is required.
User questions about Therm-X-Trol ST-80V Amtrol
0 question about this device. Answer the ones you know or ask your own.
Ask a new question about this device
No questions yet. Be the first to ask one.
Download the instructions for your Water heater in PDF format for free! Find your manual Therm-X-Trol ST-80V - Amtrol and take your electronic device back in hand. On this page are published all the documents necessary for the use of your device. Therm-X-Trol ST-80V by Amtrol.
USER MANUAL Therm-X-Trol ST-80V Amtrol
Manual assistant
Powered by Anthropic
Waiting for your message
Product information
Brand : Amtrol
Model : Therm-X-Trol ST-80V
Category : Water heater