KEYSTONE VALVE F79U-065 Pentair

( Brand: Keystone Valve ), ( Manufacturer Part Number: F79U-065 )

Review KEYSTONE VALVE Pentair F79u065 Used

The **Pentair Keystone Valve F79U-065** is a high-performance, full-port, double-disc butterfly valve engineered for demanding industrial applications where reliability, durability, and precise flow control are paramount. Designed with Pentair s Keystone brand a trusted name in fluid control systems the F79U-065 is a robust, lug-type valve featuring a **6-inch (150 mm) nominal size** and a **Class 150 pressure rating**, making it suitable for medium to high-pressure systems operating within a temperature range of **-20 F to 400 F (-29 C to 204 C)**. Its **double-disc construction** ensures balanced torque and smooth operation, reducing wear on the actuator and minimizing the risk of valve binding, even under fluctuating flow conditions. The valve s **full-port design** maximizes flow capacity, minimizing pressure drop and energy loss while maintaining laminar flow efficiency, which is critical in HVAC, water treatment, chemical processing, and municipal water distribution systems.

Constructed from **cast ductile iron (CDI) with a reinforced epoxy coating**, the F79U-065 offers exceptional corrosion resistance and structural integrity, making it ideal for applications involving water, wastewater, or mildly corrosive fluids. The **lug-type end connections** provide flexibility in installation, allowing for easy field assembly and disassembly without the need for specialized tools, while the **wafer-style option** (available as an alternative) further simplifies integration into existing piping systems. The valve s **sealed shaft design** prevents fluid leakage at the stem, enhancing safety and reducing maintenance requirements, particularly in high-pressure or hazardous environments. Additionally, the **integrated lubrication system** on the disc and seat ensures long-term sealing performance, even in systems with suspended solids or abrasive particles.

For enhanced control and automation, the F79U-065 is compatible with a wide range of **Pentair Keystone actuators**, including pneumatic, electric, and manual operators, allowing for precise throttling and remote operation. The valve s **low torque characteristics** reduce the load on actuators, extending their operational lifespan and improving system efficiency. Its **fire-safe design** (when specified) meets stringent industry standards for fire protection, ensuring reliable performance even under extreme thermal conditions. Whether used in **water distribution networks, industrial process piping, or municipal infrastructure**, the F79U-065 delivers consistent, leak-free operation with minimal maintenance, making it a cost-effective solution for long-term fluid control applications. Pentair s commitment to quality engineering ensures that this valve not only meets but exceeds industry expectations for performance, durability, and reliability.

### Pros and Cons of buying a Keystone Valve F79U-065 (Pentair F79U065)

1. **Compatibility and Reliability** The F79U-065 is a well-known model from Pentair (now Keystone), a trusted brand in pool and spa equipment. It is designed specifically for use with Pentair IntelliFlo VS variable-speed pumps, ensuring seamless integration and reliable performance.

2. **Energy Efficiency** As a variable-speed pump valve, it allows for precise control over pump speed, reducing energy consumption compared to single-speed pumps. This can lead to significant long-term savings on electricity bills.

3. **Durability and Build Quality** Pentair/Keystone valves are generally built to last, with sturdy construction and materials that withstand the demands of pool and spa systems. The F79U-065 is no exception, offering long-term reliability in harsh environments.

4. **Easy Installation and Replacement** The valve is designed for straightforward installation, often requiring minimal modifications to existing systems. It is also a common replacement part, meaning spare parts and technical support are widely available.

5. **Compatibility with Smart Systems** Many Pentair/Keystone valves, including this model, work with smart pool control systems, allowing for remote monitoring and automation of pump operations.

6. **Widely Available** Due to its popularity, the F79U-065 is easy to find in stock at pool supply stores, both online and offline, reducing lead times for replacement or new installations.

7. **Reduced Wear and Tear** Variable-speed operation reduces stress on the pump motor and other components, potentially extending the lifespan of the entire system.

---

1. **Higher Upfront Cost** Compared to traditional single-speed pump valves, variable-speed valves like the F79U-065 are more expensive to purchase initially. However, this cost is often offset by long-term energy savings.

2. **Requires Compatible Pump** This valve is specifically designed for Pentair IntelliFlo VS pumps. If you have a different brand or model of variable-speed pump, compatibility may not be guaranteed, and you may need an alternative valve.

3. **Potential Learning Curve** Variable-speed systems require some familiarity with programming and operation. If you or your technician are not experienced with these systems, there may be a learning curve in setting up and optimizing performance.

4. **Dependence on Electrical System** Variable-speed pumps rely on consistent electrical power. Fluctuations or power outages could affect performance, though most systems include backup or fail-safe mechanisms.

5. **Limited Lifespan Compared to Basic Valves** While durable, high-end components like variable-speed valves may have a shorter lifespan than basic, single-speed valves if not properly maintained. However, this is typically outweighed by their efficiency benefits.

6. **Maintenance Requirements** Variable-speed systems may require more frequent maintenance, such as cleaning filters, checking seals, and ensuring proper lubrication, to maintain optimal performance.

7. **Potential for Overcomplication** For small or low-use pools/spas, the advanced features of a variable-speed valve may be unnecessary, making a simpler, less expensive valve a more practical choice.

---

The Keystone Valve F79U-065 (Pentair F79U065) is an excellent choice for those investing in a Pentair IntelliFlo VS variable-speed pump system. Its energy efficiency, reliability, and compatibility with smart pool controls make it a strong option for homeowners or businesses looking to reduce operational costs and improve system performance. However, the higher upfront cost and the need for a compatible pump system may deter some buyers, particularly those with simpler or smaller pool setups.

For most mid-to-large residential pools or commercial applications where energy savings and longevity are priorities, this valve is a worthwhile investment. If you already have a Pentair IntelliFlo VS pump or are planning to upgrade to one, the F79U-065 is a reliable and efficient choice.

---

- You are using or upgrading to a Pentair IntelliFlo VS variable-speed pump.

- You prioritize energy efficiency and long-term cost savings.

- You have a medium to large pool or spa where variable-speed control provides noticeable benefits.

- You are comfortable with or willing to learn the operation of a variable-speed system.

- You have a single-speed pump and are not planning to upgrade.

- Your pool is very small, and the advanced features are unnecessary.

- You are on a tight budget and cannot justify the higher upfront cost without clear long-term savings.

- You lack access to proper maintenance or technical support for variable-speed systems.

For most users who meet the criteria above, the F79U-065 is a solid, high-quality valve that will enhance the performance and efficiency of your pool or spa system.

Details:

Sells new and surplus product develops channels to purchase such. Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection. All products are guaranteed to be working but may show signs of use if purchasing a used product. Call to use a shipping service other than the ones listed.

part #: f79u065 prices

• $758.58-$1000.00

specifications hydraulicylind:

• brand: Keystone Valve
• mpn: F79u-065

offer hydraulicylind:

• sold: 0
• quantity: 1
• availability: In Stock
• options: Ship-to-home
• started: March 17, 2026

general hydraulicylind:

• condition: Used
• Business Industrial > Hydraulics, Pneumatics, Pumps Plumbing > Hydraulic Pneumatic Cylinders

shipping hydraulicylind:

• cost: $12.90
• type: Fixed
• service: Standard
• class: Standard
• transit: 29-34 Days

seller hydraulicylind:

• city: 1 Millennium Dr, Willingboro, NJ 08046
• # reviews: 195056
• rating: 99.6%

returns hydraulicylind:

• paid by: Buyer
• policy: Returns Accepted
• method: Money back
• time: 30 Days

payments hydraulicylind:

• other
• wallet: Apple-pay
• credit card: Visa

Keystone Valve F79U-065 Is Similar To:

• Keystone Valve F79u-006 Pentair F79u006 Used (95.7% similar) Call to use a shipping service other than the ones listed. All products are guaranteed to be working but may show signs of use if purchasing a used product. Packaging and handling: items are safely eds packaged in custom shipping cartons for protection. Sells new and surplus product develops ...(September 20th, 2025)
• Keystone 494104 American Standard Fastener Pneumatic Actuator Used (44.6% similar) Slight discoloration on surfaces, does not affect surface. Parts have some superficial scuffing or minor surface discoloration from shelf/ storage wear. Measuring devices shown in picture for scale only - they are not included with the listing. Keystone American standard fastener pneumatic actuator ...(October 26th, 2025)
• Keystone Valve 79u-006u-a080-a00 Pentair 79u006ua080a00 Used (77.8% similar) All products are guaranteed to be working but may show signs of use if purchasing a used product. Packaging and handling: items are safely eds packaged in custom shipping cartons for protection. Sells new and surplus product develops channels to purchase such. Pentair 79U-006U-A080-A00 / ...(April 29th, 2026)