The Fleck 9500/1710 SXT Twin Duplex Eco Valve (V950SI-605) is a premium 1½" commercial and industrial twin alternating water softener control valve, engineered to deliver an uninterrupted supply of softened water in applications where downtime simply isn't an option. Designed by Pentair Fleck, the 9500 SXT automatically alternates between two mineral tanks, allowing one vessel to remain in service while the second regenerates or stands by. This ensures a continuous supply of softened water 24 hours a day without interruption.

Featuring the proven SXT electronic controller, the valve offers fully programmable regeneration cycles, simple commissioning and dependable operation. Regeneration is carried out using softened water, helping to maximise resin life, improve regeneration efficiency and reduce scale build-up within the resin beds.

Manufactured from heavy-duty lead-free brass, the Fleck 9500 has been designed for demanding commercial environments where reliability is essential. The robust valve body provides excellent durability while supporting high service flow rates for hotels, healthcare facilities, manufacturing plants, commercial laundries, food processing, apartment buildings and other high-demand installations.

With 1½" BSP connections, continuous service flow rates of 8.4 m³/hr and peak flows of 11.2 m³/hr, the Fleck 9500 is perfectly suited to larger duplex water softener systems requiring reliable, high-capacity operation. Adjustable regeneration cycles allow installers to optimise system performance for a wide range of water qualities and resin volumes.

The V950SI-605 version is supplied with the popular 1710 brine system, #4C injector, 15.0 GPM Drain Line Flow Control (DLFC) and 2.0 GPM Brine Line Flow Control (BLFC), making it an excellent choice for larger commercial duplex softeners requiring increased regeneration flow rates.

Key Features

• Genuine Pentair Fleck 9500/1710 SXT Twin Duplex Eco Valve
• Manufacturer Part Number: V950SI-605
• Twin alternating design provides continuous softened water
• One vessel remains online whilst the second regenerates
• Regenerates using softened water for improved resin performance
• Reliable SXT electronic controller
• Heavy-duty lead-free brass valve body
• Fully adjustable regeneration programming
• High flow capacity for commercial and industrial installations
• Suitable for water softeners using 1710 brine systems
• Fast connection system for the second mineral tank
• 24V powered electronic control
• Designed for professional commercial water treatment systems

Typical Applications

Ideal for:

• Commercial water softeners
• Hotels and leisure facilities
• Hospitals and healthcare
• Food & beverage production
• Commercial laundries
• Manufacturing plants
• Schools and universities
• Apartment buildings
• Process water treatment
• Industrial water softening
• Continuous-duty softened water applications

Technical Specifications

V950SI Series Comparison

The V950SI-605 is one of several configurations available within the Fleck 9500 SXT Twin Duplex valve range.

This Valve (V950SI-605) Includes

• 1710 brine system
• #4C injector
• 15.0 GPM DLFC (Drain Line Flow Control)
• 2.0 GPM BLFC (Brine Line Flow Control)

This factory configuration is designed for larger duplex softener systems requiring higher regeneration flow rates while maintaining efficient brine refill performance.

Regeneration Sequence

The SXT controller uses a fully programmable downflow regeneration cycle consisting of:

1. Backwash (Upflow)
2. Brine Draw & Slow Rinse
3. Rapid Rinse
4. Brine Tank Refill
5. Return to Service

Each regeneration stage can be individually programmed to suit the installation and water conditions.

What's Included

Every Fleck 9500/1710 SXT Twin Duplex Valve is supplied complete with:

• SXT electronic controller
• 24V transformer
• Top distributor
• Drain elbow
• Second tank adaptor

Not Included

The following items are not supplied and must be ordered separately:

• Inlet and outlet yokes
• Bypass valve
• Air check assembly
• Distributor tube (riser tube)
• Bottom distributor (lower screen)

These components allow the valve to be configured for the required vessel size and installation.

Why Choose the Fleck 9500 SXT?

The Fleck 9500 remains one of the most respected duplex water softener valves in the commercial water treatment industry. Its alternating twin-tank design eliminates downtime during regeneration, ensuring a continuous supply of softened water even during peak demand.

The combination of the proven SXT controller, heavy-duty brass construction, softened water regeneration and high flow capability makes it ideal for applications where reliability, efficiency and long service life are essential.

Whether you're building a new duplex softener or replacing an existing valve, the Fleck V950SI-605 offers professional performance trusted by water treatment engineers worldwide.