U.S. Seal Shaft Seal [PS-309] [7/8" Shaft Size] [Buna] (PS-309)
| Pump Parts | |
| US Seal Manufacturing | |
| PS-309 | |
| 35-423-1039 |
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The U.S. Seal PS-309 shaft seal is built for compatible 7/8 inch shaft pump applications and uses Buna sealing material to restore the pump’s primary barrier against leakage. In larger shaft applications, proper seal selection matters even more, because incorrect fit can undermine the entire rebuild no matter how good the surrounding parts are.
This replacement is especially useful when the original shaft seal has started leaking, hardened with age, or reached the point where it is no longer worth reinstalling. With the correct shaft-size match and a dependable Buna seal material, the PS-309 helps support a more accurate and stable repair.
It is a practical choice when a larger-shaft pump needs the right seal to protect the motor side and restore confidence in the full assembly.
- U.S. Seal PS-309 shaft seal
- For compatible 7/8 inch shaft applications
- Buna sealing material
- Helps protect the motor side from water intrusion
- Supports accurate rebuild work in larger-shaft pumps
US Seal Manufacturing – Pump Shaft Seals, Mechanical Seals and Replacement Seal Kits |
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Who is US Seal Manufacturing?
US Seal Manufacturing is a leading producer of mechanical seals and sealing components, widely used in pool, spa, and water system pumps. Since 1985, the company has built a reputation for precision engineering and dependable performance in demanding fluid-handling applications. What products does US Seal Manufacturing specialize in?US Seal Manufacturing specializes in pump shaft seals, mechanical seals, and replacement seal kits. Their products are designed to prevent water leakage along pump shafts, protecting motors and maintaining proper system operation. These components are essential for pool and spa pump maintenance and repair. Why choose US Seal Manufacturing parts for your pool or spa?US Seal products are known for durability, precision fit, and resistance to heat and chemical exposure. Their seals are engineered to perform reliably in chlorinated and saltwater environments. Pool professionals choose US Seal for high-quality replacement parts that help extend pump life and prevent costly damage. How do you identify and choose the correct US Seal Manufacturing part?To select the correct seal, it’s important to match the pump model, shaft size, seal type, and material compatibility. Reviewing part numbers and specifications ensures proper fit and performance. Choosing the right seal helps prevent leaks and maintain efficient pump operation. Need help finding the right US Seal Manufacturing part?At Bath & Spa Parts Online, we carry a wide selection of US Seal Manufacturing pool, spa, and bath parts ready to ship. Can’t find what you need? Contact our Product Specialists at 800-918-9143, use the live chat, or visit our Contact Us page. For installation guides, part diagrams, and troubleshooting resources, visit the Bath & Spa Parts Online Knowledge Base for expert support. |
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