US Seal PS-3868 Mechanical Shaft Seal (3/4″ Shaft) – Salt & Ozone Rated
Part # PS-3868 — a heavy-duty mechanical shaft seal designed for pool and spa pumps with a 3/4″ motor shaft. Engineered for harsh environments, this seal is ideal for systems using salt-chlorine generators, ozone sanitation, or operating under elevated chemical or temperature conditions.
Key Features
- Designed for pumps using a 3/4″ diameter motor shaft.
- Constructed with Viton elastomers and corrosion-resistant materials for superior chemical and temperature durability.
- Carbon/graphite rotating face paired with a ceramic stationary seat for a reliable, long-lasting seal.
- Improved performance in saltwater, ozone, and high-stress water chemistry applications.
- Direct replacement for many OEM pump shaft seals used in residential and commercial pool/spa pumps.
Typical Applications
This seal is used when a pump begins leaking from the shaft area, especially in systems running saltwater chlorination, ozone injection, or heavy bather load. Ideal for replacing worn or failed seals when servicing pump motors, impellers, or wet-end assemblies.
Installation & Compatibility Notes
Before installation, disconnect electrical power and relieve system pressure. Remove the pump housing and impeller to access the existing seal. Clean the shaft and seal seat area thoroughly. Install the PS-3868 with proper orientation, ensuring the ceramic seat is fully and evenly seated. Reassemble the pump, restore circulation, and confirm no leakage at startup.
Why Choose This Seal?
The PS-3868 is a premium-grade seal that provides enhanced resistance to salt, ozone, heat, and aggressive water chemistry. It extends pump life, reduces maintenance frequency, and offers greater reliability than standard seals—making it a smart upgrade for demanding environments.
Maintenance Tips
- Inspect the pump's shaft area regularly for early signs of seepage.
- Ensure the shaft sleeve or motor shaft surface is smooth and free of corrosion before installing a new seal.
- Use only silicone-based lubricant on O-rings; avoid petroleum products.
- Protect the pump from freeze conditions and drain water during winterizing to prevent seal damage.
