Pentair OptiFlow Repair/Replacement

  • Last Post 30 April 2021
  • Topic Is Solved
sdd142 posted this 27 April 2021

Hello, running into sloshing/grinding/bubbling noise for first time on 3 year old pump.  Cleaned out and lubed all connections, O-rings, impeller on suction intake end, including the pot and volute assemblies. No visible damage or water leaks.  Only seal I didn't check is mechanical shaft seal.  Water temp is in 40s-50s.  Could it be the cold? I also had scary bearing whining noise one really cold morning.  But that has since stopped.  Any advice on what to check next.   Or what would be a good replacement pump for my Pentair CC150 Cartridge/Base? ThanksSloshing/Grinding Noise:

Whining noise, now gone: 

Motor sounding fine disassembled: 

Current Pump/Filter Cartridge Setup everything is 3 years old:
- Pool: 24' ABP, 14,500 gallons
- Pump: Pentair Optiflo 2hp pump P/N 340078
- Cartdrige: Pentair Clean and Clear Cartridge filter CC150
- 20A dedicated electric line for pump
- 1 1/2" piping

sdd142 posted this 30 April 2021

Update on this.  Ended up replacing the shaft seal as well.   Have a new volute part on the way.  But this pump is likely on its last legs.  I got it running but am going to hang on to it for a backup and get a new one.    Got some great insight and advice from Rich @Inyopools on my issues.  And picking out a replacement pump option.    Thanks Rich!