Pentair control valve for Rainbow Automatic Feeder 320, 1/2" OEM R172086Z — direct-fit, leak-free metering

Pentair's 1/2-inch control valve R172086Z is the direct replacement part for the Rainbow Automatic Feeder 320, restoring precise chemical feed control to your pool or spa system.

If your Rainbow 320 feeder is leaking, not metering properly, or simply worn from years of service, replacing the control valve with this genuine Pentair part is a straightforward way to return the unit to reliable operation. This OEM 1/2-inch valve is designed to fit the Rainbow Automatic Chlorine/Bromine Feeder 320 housing and match original flow characteristics so you avoid compatibility headaches and unpredictable feed rates.

How will replacing the control valve restore feeder performance?

Installing a new control valve eliminates common mechanical faults—worn seals, warped components, or flow obstructions—that reduce metering accuracy. A fresh valve re-establishes the correct flow path and seating surfaces, allowing the feeder to dose chemicals consistently with the original equipment behavior.

• Restores original flow and metering precision for the Rainbow 320
• Replaces degraded seals and moving parts that cause leaks
• Matches factory specifications to avoid pressure or compatibility issues

What are the installation considerations and tools needed?

Replacement is typically a quick repair if you have basic plumbing skills and tools. Turn off circulation, depressurize the feeder, and follow the unit's service guidance to remove the old valve and seat the new R172086Z in place.

• Shut down and depressurize the feeder before starting
• Common tools: adjustable wrench, screwdrivers, plumber's grease for seals
• Inspect O-rings and tank fittings; replace any damaged gaskets

Will this valve work with my existing plumbing and feeder model?

This control valve is sized as a 1/2-inch OEM replacement for the Rainbow Automatic Chlorine/Bromine Feeder 320. It was manufactured to the same dimensions and flow specs as the original Pentair part, so it installs into the standard Rainbow 320 valve port without custom adapters.

• Compatible with Rainbow Automatic Feeder model 320
• Sized for standard 1/2-inch feeder inlet/outlet connections
• OEM part number R172086Z confirms exact-fit replacement

How do I maintain the new control valve for long life?

Simple periodic maintenance keeps the valve working well: rinse or inspect for debris, lubricate seals with compatible grease, and check for chemical degradation in harsh environments. Replace O-rings if you notice stiffness or cracks.

• Rinse valve internals during seasonal service checks
• Use non-reactive lubricant on O-rings to prevent drying
• Replace seals when visual wear or leakage appears

Who is this for: Pool and spa owners, service technicians, and facility managers who need a reliable OEM replacement for a malfunctioning Rainbow Automatic Feeder 320 will benefit from this Pentair 1/2-inch control valve. Choose this part when you want a direct-fit, factory-specified solution (R172086Z) to bring metering accuracy and leak-free operation back to your feeder without modifying plumbing or system settings.