Description
5 Pack – O-Ring Replacement for A.O. Smith (AO-WH-STD-OR-2)
Direct aftermarket replacement part for A.O. Smith whole house and under-sink systems. 3.44″ Inch diameter
| Quantity | Part Number |
|---|---|
| 5 x | AO-WH-STD-OR-2 |
For A.O. Smith whole house systems: AO-WH-PRE, AO-WH-PREV and under sink system AO-MF-B.
Packaging: Comes in bulk packaging with 5 replacement O-rings (AO-WH-STD-OR-2).
Note: User must install according to manufacturer specifications. Improper installation will result in leakage.
Product Highlights:
- High-Grade Material: Made from durable Buna-N rubber for dependable sealing performance and resistance to water and household chemicals.
- Perfect Fit: Matches A.O. Smith OEM specifications for precise size and flexibility.
- Extended Lifespan: Designed to maintain elasticity and sealing integrity through multiple filter changes.
- DIY-Friendly: No special tools required — easily replaces worn O-rings to restore optimal filtration performance.
Why Replace Your O-Ring?
Over time, O-rings can dry out, crack, or flatten, leading to small leaks or reduced filtration efficiency. Replacing them during regular filter maintenance helps prevent water damage, improves system longevity, and ensures your filtration system maintains a tight, watertight seal.
Additional Information:
- Compatible with A.O. Smith & equivalent models using O-ring part AO-WH-STD-OR-2.
- Stored and shipped in climate-controlled conditions for optimal shelf life.
- Every O-ring is inspected before packaging to ensure consistent quality and fit.
Always replace O-rings during each filter change to prevent leaks and maintain pressure integrity. For best results, apply a thin layer of dielectric silicone lubricant (available at StradianDirect.com) before installation.
Quality-tested replacement parts — built for lasting performance and reliable sealing.

