Extrol Pro EX-15PRO - Water heaters and boilers Amtrol - Free user manual and instructions
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| Product Type | Expansion tank for water heaters and boilers |
| Brand | Amtrol |
| Model | Extrol Pro EX-15PRO |
| Application | Residential and commercial water heating systems |
| Nominal Capacity | 15 gallons (56.8 liters) |
| Acceptance Volume | 4.5 gallons (17 liters) |
| Maximum Working Pressure | 150 psi (10.3 bar) |
| Maximum Operating Temperature | 240°F (115°C) |
| Factory Pre-charge Pressure | 12 psi (0.83 bar) |
| Connection Size | 1 inch NPT |
| Overall Height | 31.5 inches (80 cm) |
| Overall Diameter | 20 inches (50.8 cm) |
| Dry Weight | 30 lb (13.6 kg) |
| Power Supply | None – passive device, no electrical connection required |
| Main Function | Absorbs thermal expansion and reduces pressure spikes |
| Construction | Carbon steel shell with clean polypropylene liner |
| Maintenance | Check air pressure annually, drain and inspect for leaks |
| Safety | Equipped with replaceable diaphragm to prevent water-logging |
| Spare Parts | Replacement diaphragm and air valve are available |
| Repairability | Serviceable – internal diaphragm can be replaced |
| Storage | Store in a dry area away from freezing temperatures |
| Warranty | Standard manufacturer warranty |
Frequently Asked Questions - Extrol Pro EX-15PRO Amtrol
What is the function of my Extrol Pro EX-15PRO?
It absorbs thermal expansion in a closed water heating system, preventing pressure spikes that can damage the water heater or boiler.
What is the recommended pre-charge pressure?
The factory pre-charge is 12 psi (0.83 bar). You can adjust it with air using a standard tire valve, but always read the manual to match your system pressure.
How do I check the pre-charge pressure?
Isolate the tank and drain it, then use a pressure gauge on the air valve. Add or release air as needed.
How often should I inspect the tank?
Annually for normal residential use, or more frequently in high-usage commercial systems.
Can I use the EX-15PRO for potable water?
Yes, the Extrol PRO series is made with a clean polypropylene liner that keeps potable water safe.
What temperature and pressure limits apply?
Maximum working pressure is 150 psi (10.3 bar) and maximum temperature is 240°F (115°C).
What should I do if my tank needs replacement?
The diaphragm is replaceable. Find spare parts for the EX-15PRO and follow the disassembly instructions in the manual.
Is the tank recyclable?
The carbon steel shell can be recycled after the internal components are removed.
Why is my system losing pressure?
A worn diaphragm or incorrect pre-charge can cause pressure loss. Check the air charge and inspect the tank for leaks.
Can I install the tank myself?
Only if you are experienced with plumbing and have the correct tools. Otherwise, contact a licensed professional to avoid injury.
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USER MANUAL Extrol Pro EX-15PRO Amtrol
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Product information
Brand : Amtrol
Model : Extrol Pro EX-15PRO
Category : Water heaters and boilers