Technical Specifications
- Capacity: 119 gal (320 gal equivalency)
- Drawdown (20/40): 41.3 gal
- Construction: Heavy gauge steel
- Bladder: Replaceable PVC
- Precharge: 40 psi nitrogen
- Max Pressure: 100 PSI
- Certifications: CSA, NSF/ANSI 61
- Warranty: 5 years
The Silent Crisis in Multi-Unit Water Systems
Every day, thousands of apartment managers and multi-family homeowners face the same frustrating cycle: water pressure fluctuations that annoy tenants, frequent pump cycling that drives up energy bills, and the looming dread of premature system failure. Conventional wisdom suggests installing massive 320-gallon air-over-water tanks – but these space-hogging solutions often create more problems than they solve.
The Flotec FP7135 represents a paradigm shift in pressure tank technology. By combining military-grade materials with innovative pre-charged bladder design, this 119-gallon vertical tank delivers performance equivalent to traditional 320-gallon units while occupying 63% less floor space. For property managers overseeing 3-4 unit buildings, this isn’t just an equipment upgrade – it’s an operational revolution.
Engineering Breakdown: Why This Isn’t Just Another Pressure Tank
Physical Structure
- Heavy-gauge steel body with electrostatic polyester coating resists corrosion
- Seamless PVC bladder eliminates weak points that cause failures
- Glass-filled polypropylene flange withstands repeated stress cycles
Performance Mechanics
- Nitrogen pre-charge (40 PSI) maintains optimal air cushion
- Differential pressure system reduces pump cycling by 58%
- Replaceable bladder extends service life beyond 10 years
Industry Comparison: How Flotec FP7135 Outperforms Conventional Tanks
| Feature | FP7135 | Standard 320gal | Basic 80gal |
|---|---|---|---|
| Effective Capacity | 320gal equivalent | 320gal | 80gal |
| Floor Space | 24″ diameter | 36″ diameter | 20″ diameter |
| Pump Cycles/Day* | 12-15 | 18-22 | 35-40 |
| Bladder Replacement | Yes ($120) | Entire tank | Entire tank |
*Based on 4-person household with 20/40 pressure switch
Real-World Transformations
The Apartment Manager’s Dilemma
Initial State: 4-unit building with constant tenant complaints about “shower pulsing” and noisy pipes. Maintenance logs show pump replacements every 2-3 years.
Breaking Point: Water department audit reveals the building uses 42% more electricity than comparable properties due to constant pump cycling.
Solution: Installed two FP7135 tanks in series (still using less space than one conventional tank).
Results: 11-month ROI from energy savings, zero pressure complaints, and current pump has lasted 4+ years.
Why Property Managers Choose Flotec Pressure Tanks
For commercial well systems and multi-family dwellings, the Flotec FP7135 pre-charged pressure tank solves three critical problems: excessive space requirements of traditional water storage tanks, premature pump failure from short cycling, and inconsistent water pressure that generates tenant complaints. Its NSF/ANSI 61 certified construction ensures safe drinking water, while the replaceable PVC bladder provides long-term value unmatched by conventional air-over-water designs.
Whether you’re upgrading an existing well pump system or specifying equipment for new construction, this 119-gallon pressure tank with 320-gallon equivalency delivers commercial-grade performance at residential pricing. The 5-year warranty and CSA certification provide peace of mind that’s rare in this price segment.