Pentair Shaft Seal U109-433SS – Centrifugal Pump Replacement Seal for Pool & Spa Pumps

The Pentair U109‑433SS Shaft Seal is a genuine OEM replacement part engineered to restore and maintain proper sealing in centrifugal pool and spa pumps. Shaft seals are critical components that prevent water from entering the motor housing while allowing the pump shaft to rotate smoothly—protecting internal components and preserving efficient pump operation.

This replacement seal features corrosion‑resistant stainless steel and durable elastomer sealing surfaces to withstand the harsh chemical and environmental conditions typical of pool and spa equipment. Whether you’re repairing a leak or performing routine maintenance, the U109‑433SS delivers dependable performance and helps extend the life of your pump.

Pentair U109‑433SS Shaft Seal Compatibility

• Designed for centrifugal pool and spa pumps that require Pentair seal U109‑433SS

• Compatible with many Pentair pump models and mechanical seal housings

• Suitable for residential and commercial pool and spa systems

• Works in applications where the original shaft seal has worn, cracked, or failed

• Fits standard mechanical seal mounts on compatible centrifugal pump assemblies