Pentek Genuine OEM Replacement Part Pentek 151120 (OR-241-B) Replacement O-Ring for Standard Filter Housings BUNA-N rubber seal for 3/4" NPT standard housings – prevents leaks and water damage between cap and sump ✓ AS568-241 Standard Size ✓ Fits 10", 12" & 20" Pentek Housings ✓ BUNA-N Construction ✓ Genuine Pentek OEM The OR-241-B provides the critical water-tight seal between your filter housing cap and sump. This BUNA-N rubber O-ring fits standard Pentek #10, #12, and #20 housings with 3/4" NPT connections and should be replaced with every filter change to maintain system integrity and prevent leaks. SPECIFICATIONS Technical Details Part Number Pentek 151120 (OR-241-B) Standard Size AS568-241 Material BUNA-N Rubber Thread Connection 3/4" NPT Standard Housings Housing Compatibility Pentek #10, #12, #20 Replacement Interval Every filter change INSTALLATION & MAINTENANCE Proper O-Ring Care Clean the O-ring groove in the housing sump thoroughly before installation. Apply a thin coat of clean silicone grease to the O-ring and seat it firmly in the groove below the housing threads. O-rings are wear items that degrade with heat, pressure cycles, and time. Replace the OR-241-B with every cartridge change to maintain a reliable seal and avoid water damage from slow leaks. This is an inexpensive insurance policy for your filtration system. COMPATIBILITY Compatible Pentek Housings The Pentek 151120 OR-241-B O-ring is designed for standard Pentek filter housings including the #10 (10-inch), #12 (10-inch with pressure release), and #20 (20-inch) series with 3/4" NPT threaded connections. This is a genuine OEM replacement part that ensures proper fit and seal performance in Pentek and compatible standard housings. Genuine Pentek replacement parts are manufactured to the same specifications as the original components in your housing, ensuring reliable performance and proper fit.