Product overview

Give a compatible Pentair FNS Plus D.E. filter a backwash valve built for efficient water flow. The Pentair FullFloXF 263081 is supplied with Pentair 2-inch filter unions glued on and has its filter inlet port on the bottom to match the FNS Plus connection layout.

The FullFloXF design provides a straight-through flow path with low pressure loss. Its large comfort-grip handle and molded position markings make it straightforward to select filtration or backwash during routine filter service.

Key features

• Made for FNS Plus D.E. filters: Bottom filter-inlet configuration
• Pre-attached 2-inch Pentair unions: Designed to connect to compatible filter bulkheads
• Low-restriction flow path: FullFloXF valve design helps reduce pressure loss
• Large handle: Comfortable grip for changing valve position
• Serviceable construction: Removable end caps provide access for maintenance
• Flexible plumbing ports: Valve ports have a 2½-inch inside diameter and 3-inch outside diameter

Compatibility and specifications

Check fitment before ordering: Pentair assigns different FullFloXF valve configurations to Quad D.E., sand, Sta-Rite System:3, and other filters. Part 263081 is the bottom-inlet version identified for the FNS Plus models above.

Installation and service guidance

Confirm your filter model, inlet position, union connections, and equipment-pad clearance before replacing a valve. A qualified pool professional should install the valve and verify the filter and waste-line connections. Always turn off the pump and relieve system pressure before changing valve position or servicing the filter. Follow the filter’s instructions for backwashing and recharging D.E. media.

Frequently asked questions

Will this fit a Pentair Quad D.E. filter?
Pentair specifies a different top-inlet valve configuration for Quad D.E. filters. Check the filter model and valve connection guide before ordering.

Are the filter unions included?
Yes. Pentair identifies part 263081 as the version with 2-inch Pentair unions glued on.

Is this the Sta-Rite System:3 version?
No. Pentair lists separate FullFloXF configurations with Sta-Rite offset adapters for System:3 filters.