Is your well pump cycling on and off every few seconds, causing annoying hammering noises in your pipes? Or perhaps you are dealing with inconsistent water pressure that makes showering a frustrating experience? These are common signs that your current pressure tank is failing or undersized for your home’s demands.
Upgrading to a reliable solution like the Flotec FP7130 86 Gallon Diaphragm Pressure Tank can instantly resolve these issues, ensuring smooth water flow and extending the life of your well pump. In this comprehensive guide, we will explore everything you need to know about this plumbing staple, from its technical specifications to proper installation and maintenance.
What Is the Flotec FP7130 and How Does It Work?
The Flotec FP7130 is a pre-charged diaphragm pressure tank designed specifically for residential well water systems. Unlike older-style air-over-water tanks, this model uses a flexible butyl diaphragm to separate the water from the air cushion. This design prevents waterlogging—a common issue where the air dissolves into the water, rendering the tank useless until recharged.
The Science Behind Diaphragm Tanks
When your well pump activates, it pushes water into the tank, compressing the air on the other side of the diaphragm. This compressed air acts as a spring, pushing water out to your faucets even after the pump turns off. This process reduces the number of times your pump needs to cycle on and off, which is critical because electric motors wear out primarily during startup.
According to fluid dynamics principles, maintaining a consistent air charge is vital for system efficiency. For a deeper understanding of how pressurized vessels work in plumbing systems, you can refer to general engineering principles on Wikipedia’s page on Pressure Vessels.
Key Specifications of the Flotec FP7130
Before purchasing any plumbing supply, understanding the technical data is crucial to ensure compatibility with your existing setup. The Flotec FP7130 is built for durability and performance.
| Feature | Specification |
|---|---|
| Model Number | FP7130 |
| Total Volume | 86 Gallons |
| Tank Type | Pre-charged Diaphragm |
| Material | Steel Shell with Butyl Diaphragm |
| Pre-charge Pressure | 38 PSI (Adjustable) |
| Max Working Pressure | 125 PSI |
| Connection Size | 1″ NPT Female |
| Warranty | Typically 5 Years (Check retailer) |
Why the 86-Gallon Size Matters
An 86-gallon total volume does not mean you have 86 gallons of usable water. The “drawdown” capacity—the amount of water you can use before the pump kicks back on—is typically around 30–40% of the total volume, depending on your pressure switch settings (e.g., 40/60 PSI).
For an average American household, this drawdown capacity is significant. It means your pump might only need to run once or twice during a typical shower, rather than cycling on and off repeatedly. This stability is the primary selling point of the Flotec FP7130 86 Gallon Diaphragm Pressure Tank.
Benefits of Upgrading to a Diaphragm Tank
Switching from an old air-over-water tank or a smaller bladder tank to the Flotec FP7130 offers several tangible benefits for homeowners.
1. Extended Pump Life
Every time a well pump starts, it experiences a surge of electrical current and mechanical stress. By providing a larger buffer of stored water, the FP7130 minimizes short-cycling. Industry experts suggest that reducing pump cycles can extend the motor’s lifespan by years, saving you hundreds of dollars in replacement costs.
2. Consistent Water Pressure
Have you ever noticed the water temperature fluctuating in the shower when someone flushes a toilet? A larger tank like the FP7130 maintains pressure more effectively between pump cycles, leading to a more comfortable and consistent user experience throughout the house.
3. Low Maintenance Design
The butyl diaphragm used in Flotec tanks is resistant to permeation. This means the air charge stays stable for longer periods compared to cheaper alternatives. While annual checks are recommended, you won’t need to “burp” the tank or add air as frequently as you would with non-diaphragm models.
Installation Guide: Step-by-Step
Installing a pressure tank requires basic plumbing knowledge and adherence to safety standards. If you are uncomfortable working with water lines and electrical connections, always consult a licensed plumber. However, for the DIY enthusiast, here is the general procedure.
Safety Warning: Always turn off the power to the well pump at the circuit breaker before beginning any work.
Step 1: Prepare the Location
Ensure the installation site is level, dry, and close to the pressure switch. The Flotec FP7130 is heavy, especially when filled, so ensure the floor or stand can support the weight (approx. 100+ lbs empty, nearly 800 lbs full).
Step 2: Check the Pre-Charge Pressure
Before connecting the tank, check the air pressure using a standard tire gauge on the Schrader valve at the top of the tank.
- The pre-charge should be 2 PSI below the pump’s cut-in pressure.
- Example: If your pressure switch is set to 40/60 PSI, the tank pre-charge should be 38 PSI.
- If the pressure is low, use a bicycle pump or air compressor to adjust it. Do this while the tank is empty of water.
Step 3: Connect the Plumbing
Use Teflon tape or pipe dope on the threads. Connect the 1″ NPT female inlet of the tank to your water line. It is highly recommended to install a union joint between the tank and the piping. This allows for easier removal in the future if maintenance is required.
Step 4: Install a Check Valve
Ensure there is a check valve between the pump and the tank to prevent water from flowing back into the well when the pump shuts off. Most submersible pumps have this built-in, but verify your setup.
Step 5: Power On and Test
Turn the power back on. Let the pump fill the tank. Watch the pressure gauge. The pump should shut off when it reaches the cut-out pressure (e.g., 60 PSI). Open a faucet and let the water run. The pump should not start immediately; it should wait until the pressure drops to the cut-in point (e.g., 40 PSI).
Troubleshooting Common Issues
Even high-quality plumbing supplies like the Flotec FP7130 can encounter issues. Here is how to diagnose common problems.
Problem: The Pump Short-Cycles
If the pump turns on and off rapidly (every few seconds), the tank is likely waterlogged or the pre-charge is lost.
- Solution: Turn off the power, drain all water from the tank, and check the air pressure. If no air comes out, the diaphragm may be ruptured, requiring tank replacement. If air escapes, recharge to 2 PSI below cut-in.
Problem: Low Water Pressure
If the pressure never reaches the cut-out setting, the pump may be failing, or there could be a leak in the foot valve.
- Solution: Check for leaks in the system. If the pump runs continuously but pressure remains low, the impeller may be worn, or the well yield may be insufficient.
Problem: Water Hammer
A loud banging noise when faucets close abruptly indicates water hammer.
- Solution: While the FP7130 helps absorb shock, you may need additional water hammer arrestors near fixtures. Ensure the tank is securely anchored to prevent movement.
FAQ Section
1. How often should I check the air pressure in my Flotec FP7130?
It is recommended to check the air pressure at least once a year. The best time to do this is during routine home maintenance seasons, such as spring or fall. Consistent monitoring ensures the diaphragm is functioning correctly and prevents premature pump wear.
2. Can I install the Flotec FP7130 horizontally?
Most diaphragm tanks, including the Flotec series, are designed for vertical installation. Installing them horizontally can cause uneven wear on the diaphragm and may void the warranty. Always follow the manufacturer’s orientation guidelines printed on the tank label.
3. What is the difference between a bladder tank and a diaphragm tank?
While often used interchangeably, a true diaphragm tank (like the FP7130) has a fixed membrane bonded to the tank shell, whereas a bladder tank has a removable balloon-like bag inside. Diaphragm tanks are generally more robust and less prone to tearing because the diaphragm doesn’t stretch as much as a bladder.
4. Is the Flotec FP7130 suitable for commercial use?
The FP7130 is primarily designed for residential applications. For commercial setups with high-demand usage, you might need multiple tanks in parallel or a larger commercial-grade variable frequency drive (VFD) system. Consult a professional engineer for commercial sizing.
5. How long does the Flotec FP7130 last?
With proper maintenance and correct pre-charge pressure, a quality diaphragm tank can last between 10 to 15 years. Factors such as water quality (sediment or acidity) and operating temperature can influence this lifespan.
6. Do I need a pressure relief valve?
Yes. Local plumbing codes typically require a pressure relief valve on pressure tanks to prevent catastrophic failure if the pressure switch malfunctions and the pump over-pressurizes the system. Ensure your system includes a valve rated for at least 125 PSI.
Conclusion
Investing in the Flotec FP7130 86 Gallon Diaphragm Pressure Tank is a smart move for any homeowner relying on a well water system. It offers the perfect balance of capacity, durability, and pressure stability. By reducing pump cycling, you not only enjoy better water flow but also protect your expensive well pump from premature failure.
Remember, proper installation and annual maintenance are key to getting the most out of your investment. Check your pre-charge pressure regularly, and listen to your system—it will tell you when something is wrong.
Did you find this guide helpful? Share this article with friends or neighbors who might be struggling with their well water pressure. Together, we can keep our homes running smoothly!
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