Pentair 071725S C/EQ Series Shaft Seal

This shaft seal is best for in-ground pools using Pentair C or EQ Series pumps that show signs of leaking between the pump housing and motor. It’s ideal during motor replacements, seal plate service, or complete pump rebuilds. Pools operating for long run times or in warmer climates benefit most from a fresh seal, as heat accelerates seal wear.

Best for: Pump leaks, motor swaps, routine rebuilds

Not ideal for: Other Pentair pump models with different seal sizes

Compared to universal shaft seals, the Pentair 071725S delivers better reliability and service life in C and EQ Series pumps. Generic seals may fit loosely or wear unevenly, often leading to repeat leaks. From a pool technician’s perspective, using the correct Pentair seal saves time and prevents unnecessary motor replacements.

Pro Tip: Always replace the shaft seal when installing a new motor—reusing an old seal is the most common cause of early motor failure.

In real-world service situations, the Pentair 071725S consistently stops leaks that form at the motor-to-pump junction. When installed correctly, it restores quiet operation and protects the motor from water damage. It’s an inexpensive part with a major impact on pump reliability and lifespan. Ordering from ShastaPoolSupply.com ensures fast delivery, knowledgeable support, and the right Pentair replacement for your pump.