PS-100 5/8" Seal Assembly | U.S. Seal MFG.
PS-100 5/8" Seal Assembly | U.S. Seal MFG.
Protect your pump from leaks, wear, and costly downtime with PS-100 5/8" Seal Assembly, delivering dependable sealing performance. Specifically, this premium seal assembly installs quickly and helps extend the life of your pool or spa pump with smooth, reliable operation. ShastaPoolSupply.com supplies authentic U.S. Seal parts at discount pricing with fast shipping, so you repair your system with confidence.
What makes the PS-100 5/8" Seal Assembly a dependable replacement seal for pool pumps?
The 5/8" Seal Assembly uses proven elastomers and polished faces holding tight under continuous pump pressure and typical water chemistry. Its construction resists heat, friction, and chemical exposure, which helps maintain pump efficiency and prevents premature failure. ShastaPoolSupply.com provides only genuine U.S. Seal components, ensuring long-lasting performance for your pool or spa system.
Find other pump parts here: Swimming Pool Pump Parts

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Key Features
Precision-engineered for high-performance pool and spa pumps
Durable carbon, ceramic, and elastomer materials that resist heat and chemicals
Maintains a tight, leak-free seal to protect pump bearings and internal components
Smooth running surfaces reduce friction and extend motor life
Straightforward installation for most standard pump designs
Technical Specifications
- Material Set: Carbon/ceramic with chemical-resistant elastomer.
- Application: Pool and spa pumps requiring this specific seal size.
- Compatibility: Replaces or upgrades select OEM seal configurations (verify pump model before purchase).
Specs
- Part Number: USS-60-5018
- Manufacturer: U.S. Seal MFG.
Why Pool Professionals Trust the U.S. Seal MFG Brand?
U.S. Seal MFG is one of the most trusted suppliers of mechanical seals for pool and spa pumps. Furthermore, their components meet strict performance standards and deliver proven durability in high-demand environments. Professionals choose U.S. Seal for consistency, quality, and long-term reliability.
How a quality seal assembly makes a difference for pool pros?
A worn mechanical seal is one of the main causes of pump leaks and bearing failure. Furthermore, replacing it with a high-quality assembly like the PS-100 5/8" Seal Assembly gives your pump a clean, tight interface that prevents water intrusion and keeps the motor running cooler. Always inspect the seal shaft, spring seat, and seal plate during installation to ensure proper alignment and maximum life.
Why Buy from Shasta Pool Supply?
ShastaPoolSupply.com is powered by Arizona’s most trusted pool builder, Shasta Pools. Our expert team helps pool owners and service pros choose the right Pentair, Hayward, and Raypak products at discount prices. You get fast shipping, helpful guidance, and reliable parts backed by over 60 years of pool industry experience.
How does the U.S. Seal USS-60-5018 compare to standard mechanical seals?
The PS-100 5/8" Seal Assembly provides higher-grade sealing faces and elastomers compared to many generic replacement seals, which means it holds up better under heat and constant motor vibration. Furthermore, its precision finish improves surface contact, reducing friction and minimizing long-term wear. Also, this makes it a smart upgrade when you want dependable sealing performance and fewer future repairs.
Pro Tip: When replacing a mechanical seal, always replace the pump’s diffuser gasket or housing o-ring at the same time to ensure a complete, leak-free seal.
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What our customers are saying
Fast ship, salt cell was vital to get replaced! Thank you
Fast ship, salt cell was vital to get replaced! Thank you
Stacie S
Great product selection. Competitive pricing. Quality repair parts.
Great product selection. Competitive pricing. Quality repair parts.
Brent G
Great price on the item I needed and quick shipping
Great price on the item I needed and quick shipping
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Solar pool covers help increase water temperature, reduce energy costs, minimize chemical loss, and prevent water evaporation.
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A solar pool cover, often called a solar blanket, is a protective cover made from specialized bubble material that floats on the water’s surface. It captures solar energy from sunlight and transfers it to the pool water.
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