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Need help?Do you have a question about the Flexcon Flex 2 Pro PH Series and is the answer not in the manual?
Details thermal expansion tanks manufactured and distributed by Flexcon Industries.
One-year warranty from date of manufacture against defects in material or workmanship.
Excludes failures from improper installation, misuse, abuse, or unauthorized alterations.
Disclaims implied warranties; remedies limited to product price, excludes consequential damages.
Notify distributor within 30 days of event; contact Flexcon if no prompt response received.
Record serial number, model, installation date, installer, and retain receipt.
Maintains safe water pressures in domestic heating systems with check valves.
Absorbs thermal expansion to prevent unsafe pressures and valve operation.
Alerts to potential personal injury hazards; follow all associated safety messages.
Product contains a chemical known to cause cancer and reproductive harm.
Visually inspect product for damage during transportation before installation.
Adjust pre-charge to system pressure (max 80 psi) with 0 psi system pressure.
Select location to minimize property damage from leaks; do not install horizontally.
Disconnect power and shut off water supply, relieving system pressure before installation.
Ensure adequate support for system piping; add strapping or brackets if necessary.
Install in incoming water line, between heater and backflow preventer, using pipe dope.
Open hot faucet to remove air, turn on water, and inspect for leaks.
Annually inspect tank and connections for leaks or corrosion by a qualified professional.
Details materials like cold rolled steel, butyl rubber diaphragm, and stainless steel connection.
Provides tank dimensions (height, diameter) and capacities (gallons/liters) for PH Series.
Guides selection of appropriate tank model based on water heater volume and temperature.
The Flexcon Industries Flex 2 Pro is a thermal expansion tank designed for use in domestic hot water heating systems. Its primary function is to maintain safe water pressures within a closed-loop system, which typically includes a backflow preventer or check valve. When water in such a system heats up, it expands, and without an expansion tank, this expansion can lead to unsafe operating pressures and cause the water heater's safety relief valve to discharge. The Flex 2 Pro acts as a reservoir for this expanded water, allowing it to enter the tank and then be released back into the system on demand, thereby preventing excessive pressure buildup and nuisance relief valve operation.
The tank features a robust construction designed for durability and safe operation. Internally, it utilizes a butyl rubber diaphragm and a polypropylene liner. This design effectively separates the system water from the tank's inner walls and its pre-charge, ensuring the integrity of the water and the tank's components. The system connection is made of stainless steel, chosen for its resistance to corrosion and long-term reliability. The exterior of the tank is finished with an appliance-quality paint, which not only provides a clean aesthetic but also helps to minimize corrosion, making it suitable for indoor or outdoor installation.
Before installation, it is crucial to visually inspect the product for any signs of damage that may have occurred during transportation, such as dents, bends, or scratches. Any damaged product should be returned to the original purchase point for replacement. A key usage feature is the pre-charge adjustment. The tank is shipped from the factory with a pre-charge of 40 psi. However, any adjustments to this factory pre-charge must be made prior to initial tank installation and only when the system has 0 psi pressure. It is explicitly stated not to adjust the pre-charge of the expansion tank while the system is under pressure. The tank should be pre-charged to match the incoming system water pressure, but this pressure must not exceed 80 psi. Failure to properly adjust the pre-charge can significantly shorten the product's lifespan. To adjust the pre-charge, the protective cap from the air valve is removed, the pressure is checked with a standard tire pressure gauge, and air is added using a manual bicycle tire pump until the desired pre-charge is reached, after which the protective cap is replaced.
For installation, selecting an appropriate location is vital. The tank should be installed in a location that allows for easy access, visual inspection, and where any potential water leakage will not cause property damage. Adequate means for water drainage must be provided. It is important to note that the manufacturer is not responsible for any water damage associated with the installation or failure of the product. The tank must be installed in a vertical position; horizontal installation is not permitted. Before beginning installation, the electrical power source to the water heater must be disconnected or shut off, and the water supply to the system must be turned off, with all water pressure removed from the system. Failure to follow these instructions can result in serious injury or death and property damage. The tank is designed to be supported by the system piping, so adequate support for the piping, including strapping, brackets, or pipe hangers if necessary, should be ensured. The expansion tank is installed in the incoming cold water line to the water heater, specifically between the water heater and the backflow preventer or check valve. Adequate thread sealant (pipe dope) must be used to ensure a leak-free installation, and Teflon tape should not be used. Before turning on the water supply, a hot water faucet should be opened to prevent damage to the water heater and remove air from the system piping. Once the water supply is turned on, the installation should be inspected for water leaks, paying close attention to the connection between the expansion tank and the piping. Finally, the water heater manufacturer's instructions for proper start-up of the heater and the system should be followed.
Maintenance features emphasize annual inspection. The expansion tank and the entire system must be checked annually by a qualified professional. This involves visually examining the tank and its connection to the system piping for any signs of water leakage or corrosion on the exterior of the tank or the connection. If the expansion tank shows any visible signs of leaking, corrosion, or rusting, it must be replaced immediately to avoid personal injury or property damage. It is critical not to adjust the tank air pressure if there are any signs of corrosion on the tank. Failure to follow these instructions can result in serious injury or death and will void the product warranty. The product is intended for use on potable water systems only; any other use may be dangerous and will void the warranty. The product's performance and lifespan can be significantly and adversely impacted by aggressive water conditions. Therefore, a water test should be conducted at regular, periodic intervals, specifically looking for corrosive water, acids, and other relevant water contaminants. If present, these conditions must be treated immediately and appropriately. The system piping must be properly grounded to earth, and a dielectric union is recommended in the installation. Failure to follow these instructions can result in serious injury or death and property damage.
General| Tank Orientation | Vertical |
|---|---|
| Precharge Pressure | 40 psi |
| Maximum Working Pressure | 150 psi |
| Maximum Operating Pressure | 150 psi |
| Dimensions (H x W x D) | Varies by model |
| Weight | Varies by model |
| Material | Steel |
