Union Tailpiece O-Ring

This O-ring seals the 1-1/2" union tailpiece connection on Waterway sand and cartridge filters, heater unions, and No-Flo gate valves, replacing a worn seal that lets water seep from the union joint.

Key Features

• 1-3/4" inside diameter
• 1/8" cross-section
• Fits 1-1/2" union/tailpiece

Compatibility

• Waterway TWM Sand Filter Package
• Waterway TWM Cartridge Filter Package
• 1-1/2" union/heater union tailpiece (417-4161)
• No-Flo gate valves
• ClearWater Sand Filter couplings
• Carefree Sand Filter drain screen cap
• Waterway Crystal Water D.E. filters
• Does not fit 805-0145, 805-0232/805-0233, or 805-0435/805-0460, which are different sizes for different unions and filter bodies

Several similarly numbered Waterway O-rings (805-0145, 805-0226, 805-0232, 805-0233, 805-0435, 805-0460) are different sizes for different unions and filters, so matching only the "805" prefix without the full part number can result in the wrong seal.