Swimables 3/4" Stainless Air Vent for FNS Plus pentair check valve flapper Proper alignment and secure seating

Proper alignment and secure seating are essential to ensure even water distribution and correct filter operation

Easy Inline Installation — Installs directly into the pressure hose line with no modification required

Proper installation helps ensure safe startup and long-term filter reliability

Why a Dual-Bristle Plaster Brush Matters

damage equipment

Swimables 3/4" Stainless Air Vent for FNS Plus pentair check valve flapper Proper alignment and secure seatingKey Fit and Function Releases Trapped Air from Filter Tank Designed to safely vent trapped air during startup, preventing pressure buildup and ensuring proper filter operation Compatible with FNS Plus & Nautilus Filters Fits Pentair FNS Plus and Nautilus style pool filters that use a 3 4" air vent connection 3 4" Threaded Replacement Fit Matches original thread sizing for straightforward replacement without plumbing modifications Stainless Steel